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Comparing libev/ev.c (file contents):
Revision 1.355 by root, Fri Oct 22 10:09:12 2010 UTC vs.
Revision 1.491 by root, Thu Jun 20 23:14:53 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# define EV_USE_LINUXAIO 0
331#endif
332
293#ifndef EV_USE_INOTIFY 333#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 334# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS 335# define EV_USE_INOTIFY EV_FEATURE_OS
296# else 336# else
297# define EV_USE_INOTIFY 0 337# define EV_USE_INOTIFY 0
… …
338 378
339#ifndef EV_HEAP_CACHE_AT 379#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 380# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 381#endif
342 382
383#ifdef __ANDROID__
384/* supposedly, android doesn't typedef fd_mask */
385# undef EV_USE_SELECT
386# define EV_USE_SELECT 0
387/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
388# undef EV_USE_CLOCK_SYSCALL
389# define EV_USE_CLOCK_SYSCALL 0
390#endif
391
392/* aix's poll.h seems to cause lots of trouble */
393#ifdef _AIX
394/* AIX has a completely broken poll.h header */
395# undef EV_USE_POLL
396# define EV_USE_POLL 0
397#endif
398
399#if EV_USE_LINUXAIO
400# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
401#endif
402
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 403/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 404/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 405#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 406# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 407# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 408# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 409# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 410# define EV_USE_MONOTONIC 1
351# else 411# else
… …
354# endif 414# endif
355#endif 415#endif
356 416
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 417/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 418
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 419#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 420# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 421# define EV_USE_MONOTONIC 0
368#endif 422#endif
369 423
… …
376# undef EV_USE_INOTIFY 430# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 431# define EV_USE_INOTIFY 0
378#endif 432#endif
379 433
380#if !EV_USE_NANOSLEEP 434#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 435/* hp-ux has it in sys/time.h, which we unconditionally include above */
436# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 437# include <sys/select.h>
383# endif 438# endif
384#endif 439#endif
385 440
441#if EV_USE_LINUXAIO
442# include <sys/syscall.h>
443# if !SYS_io_getevents
444# undef EV_USE_LINUXAIO
445# define EV_USE_LINUXAIO 0
446# endif
447#endif
448
386#if EV_USE_INOTIFY 449#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 450# include <sys/statfs.h>
389# include <sys/inotify.h> 451# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 452/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 453# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 454# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 455# define EV_USE_INOTIFY 0
394# endif 456# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 457#endif
400 458
401#if EV_USE_EVENTFD 459#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 460/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 461# include <stdint.h>
… …
443#else 501#else
444# define EV_FREQUENT_CHECK do { } while (0) 502# define EV_FREQUENT_CHECK do { } while (0)
445#endif 503#endif
446 504
447/* 505/*
448 * This is used to avoid floating point rounding problems. 506 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 507 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 508 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 509#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
510/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 511
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 512#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 513#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 514
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 515#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 516#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 517
518/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
519/* ECB.H BEGIN */
520/*
521 * libecb - http://software.schmorp.de/pkg/libecb
522 *
523 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
524 * Copyright (©) 2011 Emanuele Giaquinta
525 * All rights reserved.
526 *
527 * Redistribution and use in source and binary forms, with or without modifica-
528 * tion, are permitted provided that the following conditions are met:
529 *
530 * 1. Redistributions of source code must retain the above copyright notice,
531 * this list of conditions and the following disclaimer.
532 *
533 * 2. Redistributions in binary form must reproduce the above copyright
534 * notice, this list of conditions and the following disclaimer in the
535 * documentation and/or other materials provided with the distribution.
536 *
537 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
538 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
539 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
540 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
541 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
542 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
543 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
544 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
545 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
546 * OF THE POSSIBILITY OF SUCH DAMAGE.
547 *
548 * Alternatively, the contents of this file may be used under the terms of
549 * the GNU General Public License ("GPL") version 2 or any later version,
550 * in which case the provisions of the GPL are applicable instead of
551 * the above. If you wish to allow the use of your version of this file
552 * only under the terms of the GPL and not to allow others to use your
553 * version of this file under the BSD license, indicate your decision
554 * by deleting the provisions above and replace them with the notice
555 * and other provisions required by the GPL. If you do not delete the
556 * provisions above, a recipient may use your version of this file under
557 * either the BSD or the GPL.
558 */
559
560#ifndef ECB_H
561#define ECB_H
562
563/* 16 bits major, 16 bits minor */
564#define ECB_VERSION 0x00010005
565
566#ifdef _WIN32
567 typedef signed char int8_t;
568 typedef unsigned char uint8_t;
569 typedef signed short int16_t;
570 typedef unsigned short uint16_t;
571 typedef signed int int32_t;
572 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 573 #if __GNUC__
574 typedef signed long long int64_t;
575 typedef unsigned long long uint64_t;
576 #else /* _MSC_VER || __BORLANDC__ */
577 typedef signed __int64 int64_t;
578 typedef unsigned __int64 uint64_t;
579 #endif
580 #ifdef _WIN64
581 #define ECB_PTRSIZE 8
582 typedef uint64_t uintptr_t;
583 typedef int64_t intptr_t;
584 #else
585 #define ECB_PTRSIZE 4
586 typedef uint32_t uintptr_t;
587 typedef int32_t intptr_t;
588 #endif
589#else
590 #include <inttypes.h>
591 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
592 #define ECB_PTRSIZE 8
593 #else
594 #define ECB_PTRSIZE 4
595 #endif
596#endif
597
598#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
599#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
600
601/* work around x32 idiocy by defining proper macros */
602#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
603 #if _ILP32
604 #define ECB_AMD64_X32 1
605 #else
606 #define ECB_AMD64 1
607 #endif
608#endif
609
610/* many compilers define _GNUC_ to some versions but then only implement
611 * what their idiot authors think are the "more important" extensions,
612 * causing enormous grief in return for some better fake benchmark numbers.
613 * or so.
614 * we try to detect these and simply assume they are not gcc - if they have
615 * an issue with that they should have done it right in the first place.
616 */
617#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
618 #define ECB_GCC_VERSION(major,minor) 0
619#else
620 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
621#endif
622
623#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
624
625#if __clang__ && defined __has_builtin
626 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
627#else
628 #define ECB_CLANG_BUILTIN(x) 0
629#endif
630
631#if __clang__ && defined __has_extension
632 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
633#else
634 #define ECB_CLANG_EXTENSION(x) 0
635#endif
636
637#define ECB_CPP (__cplusplus+0)
638#define ECB_CPP11 (__cplusplus >= 201103L)
639#define ECB_CPP14 (__cplusplus >= 201402L)
640#define ECB_CPP17 (__cplusplus >= 201703L)
641
642#if ECB_CPP
643 #define ECB_C 0
644 #define ECB_STDC_VERSION 0
645#else
646 #define ECB_C 1
647 #define ECB_STDC_VERSION __STDC_VERSION__
648#endif
649
650#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
651#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
652#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
653
654#if ECB_CPP
655 #define ECB_EXTERN_C extern "C"
656 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
657 #define ECB_EXTERN_C_END }
658#else
659 #define ECB_EXTERN_C extern
660 #define ECB_EXTERN_C_BEG
661 #define ECB_EXTERN_C_END
662#endif
663
664/*****************************************************************************/
665
666/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
667/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
668
669#if ECB_NO_THREADS
670 #define ECB_NO_SMP 1
671#endif
672
673#if ECB_NO_SMP
674 #define ECB_MEMORY_FENCE do { } while (0)
675#endif
676
677/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
678#if __xlC__ && ECB_CPP
679 #include <builtins.h>
680#endif
681
682#if 1400 <= _MSC_VER
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #if __i386 || __i386__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
690 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
691 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
692 #elif ECB_GCC_AMD64
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
694 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
695 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
696 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
698 #elif defined __ARM_ARCH_2__ \
699 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
700 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
701 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
702 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
703 || defined __ARM_ARCH_5TEJ__
704 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
705 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
706 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
707 || defined __ARM_ARCH_6T2__
708 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
709 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
710 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
711 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
712 #elif __aarch64__
713 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
714 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
715 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
716 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
717 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
718 #elif defined __s390__ || defined __s390x__
719 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
720 #elif defined __mips__
721 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
722 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
723 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
724 #elif defined __alpha__
725 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
726 #elif defined __hppa__
727 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
728 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
729 #elif defined __ia64__
730 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
731 #elif defined __m68k__
732 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
733 #elif defined __m88k__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
735 #elif defined __sh__
736 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
737 #endif
738 #endif
739#endif
740
741#ifndef ECB_MEMORY_FENCE
742 #if ECB_GCC_VERSION(4,7)
743 /* see comment below (stdatomic.h) about the C11 memory model. */
744 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
745 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
746 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
747
748 #elif ECB_CLANG_EXTENSION(c_atomic)
749 /* see comment below (stdatomic.h) about the C11 memory model. */
750 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
751 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
752 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
753
754 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
755 #define ECB_MEMORY_FENCE __sync_synchronize ()
756 #elif _MSC_VER >= 1500 /* VC++ 2008 */
757 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
758 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
759 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
760 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
761 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
762 #elif _MSC_VER >= 1400 /* VC++ 2005 */
763 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
764 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
765 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
766 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
767 #elif defined _WIN32
768 #include <WinNT.h>
769 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
770 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
771 #include <mbarrier.h>
772 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
773 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
774 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
775 #elif __xlC__
776 #define ECB_MEMORY_FENCE __sync ()
777 #endif
778#endif
779
780#ifndef ECB_MEMORY_FENCE
781 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
782 /* we assume that these memory fences work on all variables/all memory accesses, */
783 /* not just C11 atomics and atomic accesses */
784 #include <stdatomic.h>
785 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
786 /* any fence other than seq_cst, which isn't very efficient for us. */
787 /* Why that is, we don't know - either the C11 memory model is quite useless */
788 /* for most usages, or gcc and clang have a bug */
789 /* I *currently* lean towards the latter, and inefficiently implement */
790 /* all three of ecb's fences as a seq_cst fence */
791 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
792 /* for all __atomic_thread_fence's except seq_cst */
793 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
794 #endif
795#endif
796
797#ifndef ECB_MEMORY_FENCE
798 #if !ECB_AVOID_PTHREADS
799 /*
800 * if you get undefined symbol references to pthread_mutex_lock,
801 * or failure to find pthread.h, then you should implement
802 * the ECB_MEMORY_FENCE operations for your cpu/compiler
803 * OR provide pthread.h and link against the posix thread library
804 * of your system.
805 */
806 #include <pthread.h>
807 #define ECB_NEEDS_PTHREADS 1
808 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
809
810 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
811 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
812 #endif
813#endif
814
815#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
816 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
817#endif
818
819#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
820 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
821#endif
822
823/*****************************************************************************/
824
825#if ECB_CPP
826 #define ecb_inline static inline
827#elif ECB_GCC_VERSION(2,5)
828 #define ecb_inline static __inline__
829#elif ECB_C99
830 #define ecb_inline static inline
831#else
832 #define ecb_inline static
833#endif
834
835#if ECB_GCC_VERSION(3,3)
836 #define ecb_restrict __restrict__
837#elif ECB_C99
838 #define ecb_restrict restrict
839#else
840 #define ecb_restrict
841#endif
842
843typedef int ecb_bool;
844
845#define ECB_CONCAT_(a, b) a ## b
846#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
847#define ECB_STRINGIFY_(a) # a
848#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
849#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
850
851#define ecb_function_ ecb_inline
852
853#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
854 #define ecb_attribute(attrlist) __attribute__ (attrlist)
855#else
856 #define ecb_attribute(attrlist)
857#endif
858
859#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
860 #define ecb_is_constant(expr) __builtin_constant_p (expr)
861#else
862 /* possible C11 impl for integral types
863 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
864 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
865
866 #define ecb_is_constant(expr) 0
867#endif
868
869#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 870 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 871#else
467# define expect(expr,value) (expr) 872 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 873#endif
472#endif
473 874
875#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
876 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
877#else
878 #define ecb_prefetch(addr,rw,locality)
879#endif
880
881/* no emulation for ecb_decltype */
882#if ECB_CPP11
883 // older implementations might have problems with decltype(x)::type, work around it
884 template<class T> struct ecb_decltype_t { typedef T type; };
885 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
886#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
887 #define ecb_decltype(x) __typeof__ (x)
888#endif
889
890#if _MSC_VER >= 1300
891 #define ecb_deprecated __declspec (deprecated)
892#else
893 #define ecb_deprecated ecb_attribute ((__deprecated__))
894#endif
895
896#if _MSC_VER >= 1500
897 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
898#elif ECB_GCC_VERSION(4,5)
899 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
900#else
901 #define ecb_deprecated_message(msg) ecb_deprecated
902#endif
903
904#if _MSC_VER >= 1400
905 #define ecb_noinline __declspec (noinline)
906#else
907 #define ecb_noinline ecb_attribute ((__noinline__))
908#endif
909
910#define ecb_unused ecb_attribute ((__unused__))
911#define ecb_const ecb_attribute ((__const__))
912#define ecb_pure ecb_attribute ((__pure__))
913
914#if ECB_C11 || __IBMC_NORETURN
915 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
916 #define ecb_noreturn _Noreturn
917#elif ECB_CPP11
918 #define ecb_noreturn [[noreturn]]
919#elif _MSC_VER >= 1200
920 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
921 #define ecb_noreturn __declspec (noreturn)
922#else
923 #define ecb_noreturn ecb_attribute ((__noreturn__))
924#endif
925
926#if ECB_GCC_VERSION(4,3)
927 #define ecb_artificial ecb_attribute ((__artificial__))
928 #define ecb_hot ecb_attribute ((__hot__))
929 #define ecb_cold ecb_attribute ((__cold__))
930#else
931 #define ecb_artificial
932 #define ecb_hot
933 #define ecb_cold
934#endif
935
936/* put around conditional expressions if you are very sure that the */
937/* expression is mostly true or mostly false. note that these return */
938/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 939#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 940#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
941/* for compatibility to the rest of the world */
942#define ecb_likely(expr) ecb_expect_true (expr)
943#define ecb_unlikely(expr) ecb_expect_false (expr)
944
945/* count trailing zero bits and count # of one bits */
946#if ECB_GCC_VERSION(3,4) \
947 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
948 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
949 && ECB_CLANG_BUILTIN(__builtin_popcount))
950 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
951 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
952 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
953 #define ecb_ctz32(x) __builtin_ctz (x)
954 #define ecb_ctz64(x) __builtin_ctzll (x)
955 #define ecb_popcount32(x) __builtin_popcount (x)
956 /* no popcountll */
957#else
958 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
959 ecb_function_ ecb_const int
960 ecb_ctz32 (uint32_t x)
961 {
962#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
963 unsigned long r;
964 _BitScanForward (&r, x);
965 return (int)r;
966#else
967 int r = 0;
968
969 x &= ~x + 1; /* this isolates the lowest bit */
970
971#if ECB_branchless_on_i386
972 r += !!(x & 0xaaaaaaaa) << 0;
973 r += !!(x & 0xcccccccc) << 1;
974 r += !!(x & 0xf0f0f0f0) << 2;
975 r += !!(x & 0xff00ff00) << 3;
976 r += !!(x & 0xffff0000) << 4;
977#else
978 if (x & 0xaaaaaaaa) r += 1;
979 if (x & 0xcccccccc) r += 2;
980 if (x & 0xf0f0f0f0) r += 4;
981 if (x & 0xff00ff00) r += 8;
982 if (x & 0xffff0000) r += 16;
983#endif
984
985 return r;
986#endif
987 }
988
989 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
990 ecb_function_ ecb_const int
991 ecb_ctz64 (uint64_t x)
992 {
993#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
994 unsigned long r;
995 _BitScanForward64 (&r, x);
996 return (int)r;
997#else
998 int shift = x & 0xffffffff ? 0 : 32;
999 return ecb_ctz32 (x >> shift) + shift;
1000#endif
1001 }
1002
1003 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1004 ecb_function_ ecb_const int
1005 ecb_popcount32 (uint32_t x)
1006 {
1007 x -= (x >> 1) & 0x55555555;
1008 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1009 x = ((x >> 4) + x) & 0x0f0f0f0f;
1010 x *= 0x01010101;
1011
1012 return x >> 24;
1013 }
1014
1015 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1016 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1017 {
1018#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1019 unsigned long r;
1020 _BitScanReverse (&r, x);
1021 return (int)r;
1022#else
1023 int r = 0;
1024
1025 if (x >> 16) { x >>= 16; r += 16; }
1026 if (x >> 8) { x >>= 8; r += 8; }
1027 if (x >> 4) { x >>= 4; r += 4; }
1028 if (x >> 2) { x >>= 2; r += 2; }
1029 if (x >> 1) { r += 1; }
1030
1031 return r;
1032#endif
1033 }
1034
1035 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1036 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1037 {
1038#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1039 unsigned long r;
1040 _BitScanReverse64 (&r, x);
1041 return (int)r;
1042#else
1043 int r = 0;
1044
1045 if (x >> 32) { x >>= 32; r += 32; }
1046
1047 return r + ecb_ld32 (x);
1048#endif
1049 }
1050#endif
1051
1052ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1053ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1054ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1055ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1056
1057ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1058ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1059{
1060 return ( (x * 0x0802U & 0x22110U)
1061 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1062}
1063
1064ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1065ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1066{
1067 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1068 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1069 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1070 x = ( x >> 8 ) | ( x << 8);
1071
1072 return x;
1073}
1074
1075ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1076ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1077{
1078 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1079 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1080 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1081 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1082 x = ( x >> 16 ) | ( x << 16);
1083
1084 return x;
1085}
1086
1087/* popcount64 is only available on 64 bit cpus as gcc builtin */
1088/* so for this version we are lazy */
1089ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1090ecb_function_ ecb_const int
1091ecb_popcount64 (uint64_t x)
1092{
1093 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1094}
1095
1096ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1097ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1098ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1099ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1100ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1101ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1102ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1103ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1104
1105ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1106ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1107ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1108ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1109ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1110ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1111ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1112ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1113
1114#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1115 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1116 #define ecb_bswap16(x) __builtin_bswap16 (x)
1117 #else
1118 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1119 #endif
1120 #define ecb_bswap32(x) __builtin_bswap32 (x)
1121 #define ecb_bswap64(x) __builtin_bswap64 (x)
1122#elif _MSC_VER
1123 #include <stdlib.h>
1124 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1125 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1126 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1127#else
1128 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1129 ecb_function_ ecb_const uint16_t
1130 ecb_bswap16 (uint16_t x)
1131 {
1132 return ecb_rotl16 (x, 8);
1133 }
1134
1135 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1136 ecb_function_ ecb_const uint32_t
1137 ecb_bswap32 (uint32_t x)
1138 {
1139 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1140 }
1141
1142 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1143 ecb_function_ ecb_const uint64_t
1144 ecb_bswap64 (uint64_t x)
1145 {
1146 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1147 }
1148#endif
1149
1150#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1151 #define ecb_unreachable() __builtin_unreachable ()
1152#else
1153 /* this seems to work fine, but gcc always emits a warning for it :/ */
1154 ecb_inline ecb_noreturn void ecb_unreachable (void);
1155 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1156#endif
1157
1158/* try to tell the compiler that some condition is definitely true */
1159#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1160
1161ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1162ecb_inline ecb_const uint32_t
1163ecb_byteorder_helper (void)
1164{
1165 /* the union code still generates code under pressure in gcc, */
1166 /* but less than using pointers, and always seems to */
1167 /* successfully return a constant. */
1168 /* the reason why we have this horrible preprocessor mess */
1169 /* is to avoid it in all cases, at least on common architectures */
1170 /* or when using a recent enough gcc version (>= 4.6) */
1171#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1172 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1173 #define ECB_LITTLE_ENDIAN 1
1174 return 0x44332211;
1175#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1176 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1177 #define ECB_BIG_ENDIAN 1
1178 return 0x11223344;
1179#else
1180 union
1181 {
1182 uint8_t c[4];
1183 uint32_t u;
1184 } u = { 0x11, 0x22, 0x33, 0x44 };
1185 return u.u;
1186#endif
1187}
1188
1189ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1190ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1191ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1192ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1193
1194#if ECB_GCC_VERSION(3,0) || ECB_C99
1195 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1196#else
1197 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1198#endif
1199
1200#if ECB_CPP
1201 template<typename T>
1202 static inline T ecb_div_rd (T val, T div)
1203 {
1204 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1205 }
1206 template<typename T>
1207 static inline T ecb_div_ru (T val, T div)
1208 {
1209 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1210 }
1211#else
1212 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1213 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1214#endif
1215
1216#if ecb_cplusplus_does_not_suck
1217 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1218 template<typename T, int N>
1219 static inline int ecb_array_length (const T (&arr)[N])
1220 {
1221 return N;
1222 }
1223#else
1224 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1225#endif
1226
1227ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1228ecb_function_ ecb_const uint32_t
1229ecb_binary16_to_binary32 (uint32_t x)
1230{
1231 unsigned int s = (x & 0x8000) << (31 - 15);
1232 int e = (x >> 10) & 0x001f;
1233 unsigned int m = x & 0x03ff;
1234
1235 if (ecb_expect_false (e == 31))
1236 /* infinity or NaN */
1237 e = 255 - (127 - 15);
1238 else if (ecb_expect_false (!e))
1239 {
1240 if (ecb_expect_true (!m))
1241 /* zero, handled by code below by forcing e to 0 */
1242 e = 0 - (127 - 15);
1243 else
1244 {
1245 /* subnormal, renormalise */
1246 unsigned int s = 10 - ecb_ld32 (m);
1247
1248 m = (m << s) & 0x3ff; /* mask implicit bit */
1249 e -= s - 1;
1250 }
1251 }
1252
1253 /* e and m now are normalised, or zero, (or inf or nan) */
1254 e += 127 - 15;
1255
1256 return s | (e << 23) | (m << (23 - 10));
1257}
1258
1259ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1260ecb_function_ ecb_const uint16_t
1261ecb_binary32_to_binary16 (uint32_t x)
1262{
1263 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1264 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1265 unsigned int m = x & 0x007fffff;
1266
1267 x &= 0x7fffffff;
1268
1269 /* if it's within range of binary16 normals, use fast path */
1270 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1271 {
1272 /* mantissa round-to-even */
1273 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1274
1275 /* handle overflow */
1276 if (ecb_expect_false (m >= 0x00800000))
1277 {
1278 m >>= 1;
1279 e += 1;
1280 }
1281
1282 return s | (e << 10) | (m >> (23 - 10));
1283 }
1284
1285 /* handle large numbers and infinity */
1286 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1287 return s | 0x7c00;
1288
1289 /* handle zero, subnormals and small numbers */
1290 if (ecb_expect_true (x < 0x38800000))
1291 {
1292 /* zero */
1293 if (ecb_expect_true (!x))
1294 return s;
1295
1296 /* handle subnormals */
1297
1298 /* too small, will be zero */
1299 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1300 return s;
1301
1302 m |= 0x00800000; /* make implicit bit explicit */
1303
1304 /* very tricky - we need to round to the nearest e (+10) bit value */
1305 {
1306 unsigned int bits = 14 - e;
1307 unsigned int half = (1 << (bits - 1)) - 1;
1308 unsigned int even = (m >> bits) & 1;
1309
1310 /* if this overflows, we will end up with a normalised number */
1311 m = (m + half + even) >> bits;
1312 }
1313
1314 return s | m;
1315 }
1316
1317 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1318 m >>= 13;
1319
1320 return s | 0x7c00 | m | !m;
1321}
1322
1323/*******************************************************************************/
1324/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1325
1326/* basically, everything uses "ieee pure-endian" floating point numbers */
1327/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1328#if 0 \
1329 || __i386 || __i386__ \
1330 || ECB_GCC_AMD64 \
1331 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1332 || defined __s390__ || defined __s390x__ \
1333 || defined __mips__ \
1334 || defined __alpha__ \
1335 || defined __hppa__ \
1336 || defined __ia64__ \
1337 || defined __m68k__ \
1338 || defined __m88k__ \
1339 || defined __sh__ \
1340 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1341 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1342 || defined __aarch64__
1343 #define ECB_STDFP 1
1344 #include <string.h> /* for memcpy */
1345#else
1346 #define ECB_STDFP 0
1347#endif
1348
1349#ifndef ECB_NO_LIBM
1350
1351 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1352
1353 /* only the oldest of old doesn't have this one. solaris. */
1354 #ifdef INFINITY
1355 #define ECB_INFINITY INFINITY
1356 #else
1357 #define ECB_INFINITY HUGE_VAL
1358 #endif
1359
1360 #ifdef NAN
1361 #define ECB_NAN NAN
1362 #else
1363 #define ECB_NAN ECB_INFINITY
1364 #endif
1365
1366 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1367 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1368 #define ecb_frexpf(x,e) frexpf ((x), (e))
1369 #else
1370 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1371 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1372 #endif
1373
1374 /* convert a float to ieee single/binary32 */
1375 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1376 ecb_function_ ecb_const uint32_t
1377 ecb_float_to_binary32 (float x)
1378 {
1379 uint32_t r;
1380
1381 #if ECB_STDFP
1382 memcpy (&r, &x, 4);
1383 #else
1384 /* slow emulation, works for anything but -0 */
1385 uint32_t m;
1386 int e;
1387
1388 if (x == 0e0f ) return 0x00000000U;
1389 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1390 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1391 if (x != x ) return 0x7fbfffffU;
1392
1393 m = ecb_frexpf (x, &e) * 0x1000000U;
1394
1395 r = m & 0x80000000U;
1396
1397 if (r)
1398 m = -m;
1399
1400 if (e <= -126)
1401 {
1402 m &= 0xffffffU;
1403 m >>= (-125 - e);
1404 e = -126;
1405 }
1406
1407 r |= (e + 126) << 23;
1408 r |= m & 0x7fffffU;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* converts an ieee single/binary32 to a float */
1415 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1416 ecb_function_ ecb_const float
1417 ecb_binary32_to_float (uint32_t x)
1418 {
1419 float r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 4);
1423 #else
1424 /* emulation, only works for normals and subnormals and +0 */
1425 int neg = x >> 31;
1426 int e = (x >> 23) & 0xffU;
1427
1428 x &= 0x7fffffU;
1429
1430 if (e)
1431 x |= 0x800000U;
1432 else
1433 e = 1;
1434
1435 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1436 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1437
1438 r = neg ? -r : r;
1439 #endif
1440
1441 return r;
1442 }
1443
1444 /* convert a double to ieee double/binary64 */
1445 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1446 ecb_function_ ecb_const uint64_t
1447 ecb_double_to_binary64 (double x)
1448 {
1449 uint64_t r;
1450
1451 #if ECB_STDFP
1452 memcpy (&r, &x, 8);
1453 #else
1454 /* slow emulation, works for anything but -0 */
1455 uint64_t m;
1456 int e;
1457
1458 if (x == 0e0 ) return 0x0000000000000000U;
1459 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1460 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1461 if (x != x ) return 0X7ff7ffffffffffffU;
1462
1463 m = frexp (x, &e) * 0x20000000000000U;
1464
1465 r = m & 0x8000000000000000;;
1466
1467 if (r)
1468 m = -m;
1469
1470 if (e <= -1022)
1471 {
1472 m &= 0x1fffffffffffffU;
1473 m >>= (-1021 - e);
1474 e = -1022;
1475 }
1476
1477 r |= ((uint64_t)(e + 1022)) << 52;
1478 r |= m & 0xfffffffffffffU;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* converts an ieee double/binary64 to a double */
1485 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1486 ecb_function_ ecb_const double
1487 ecb_binary64_to_double (uint64_t x)
1488 {
1489 double r;
1490
1491 #if ECB_STDFP
1492 memcpy (&r, &x, 8);
1493 #else
1494 /* emulation, only works for normals and subnormals and +0 */
1495 int neg = x >> 63;
1496 int e = (x >> 52) & 0x7ffU;
1497
1498 x &= 0xfffffffffffffU;
1499
1500 if (e)
1501 x |= 0x10000000000000U;
1502 else
1503 e = 1;
1504
1505 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1506 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1507
1508 r = neg ? -r : r;
1509 #endif
1510
1511 return r;
1512 }
1513
1514 /* convert a float to ieee half/binary16 */
1515 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1516 ecb_function_ ecb_const uint16_t
1517 ecb_float_to_binary16 (float x)
1518 {
1519 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1520 }
1521
1522 /* convert an ieee half/binary16 to float */
1523 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1524 ecb_function_ ecb_const float
1525 ecb_binary16_to_float (uint16_t x)
1526 {
1527 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1528 }
1529
1530#endif
1531
1532#endif
1533
1534/* ECB.H END */
1535
1536#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1537/* if your architecture doesn't need memory fences, e.g. because it is
1538 * single-cpu/core, or if you use libev in a project that doesn't use libev
1539 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1540 * libev, in which cases the memory fences become nops.
1541 * alternatively, you can remove this #error and link against libpthread,
1542 * which will then provide the memory fences.
1543 */
1544# error "memory fences not defined for your architecture, please report"
1545#endif
1546
1547#ifndef ECB_MEMORY_FENCE
1548# define ECB_MEMORY_FENCE do { } while (0)
1549# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1550# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1551#endif
1552
1553#define expect_false(cond) ecb_expect_false (cond)
1554#define expect_true(cond) ecb_expect_true (cond)
1555#define noinline ecb_noinline
1556
476#define inline_size static inline 1557#define inline_size ecb_inline
477 1558
478#if EV_FEATURE_CODE 1559#if EV_FEATURE_CODE
479# define inline_speed static inline 1560# define inline_speed ecb_inline
480#else 1561#else
481# define inline_speed static noinline 1562# define inline_speed noinline static
482#endif 1563#endif
483 1564
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1565#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1566
486#if EV_MINPRI == EV_MAXPRI 1567#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1568# define ABSPRI(w) (((W)w), 0)
488#else 1569#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1570# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1571#endif
491 1572
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1573#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1574
495typedef ev_watcher *W; 1575typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1576typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1577typedef ev_watcher_time *WT;
498 1578
… …
523# include "ev_win32.c" 1603# include "ev_win32.c"
524#endif 1604#endif
525 1605
526/*****************************************************************************/ 1606/*****************************************************************************/
527 1607
1608/* define a suitable floor function (only used by periodics atm) */
1609
1610#if EV_USE_FLOOR
1611# include <math.h>
1612# define ev_floor(v) floor (v)
1613#else
1614
1615#include <float.h>
1616
1617/* a floor() replacement function, should be independent of ev_tstamp type */
1618noinline
1619static ev_tstamp
1620ev_floor (ev_tstamp v)
1621{
1622 /* the choice of shift factor is not terribly important */
1623#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1624 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1625#else
1626 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1627#endif
1628
1629 /* argument too large for an unsigned long? */
1630 if (expect_false (v >= shift))
1631 {
1632 ev_tstamp f;
1633
1634 if (v == v - 1.)
1635 return v; /* very large number */
1636
1637 f = shift * ev_floor (v * (1. / shift));
1638 return f + ev_floor (v - f);
1639 }
1640
1641 /* special treatment for negative args? */
1642 if (expect_false (v < 0.))
1643 {
1644 ev_tstamp f = -ev_floor (-v);
1645
1646 return f - (f == v ? 0 : 1);
1647 }
1648
1649 /* fits into an unsigned long */
1650 return (unsigned long)v;
1651}
1652
1653#endif
1654
1655/*****************************************************************************/
1656
1657#ifdef __linux
1658# include <sys/utsname.h>
1659#endif
1660
1661noinline ecb_cold
528static unsigned int noinline 1662static unsigned int
529ev_linux_version (void) 1663ev_linux_version (void)
530{ 1664{
531#ifdef __linux 1665#ifdef __linux
1666 unsigned int v = 0;
532 struct utsname buf; 1667 struct utsname buf;
533 unsigned int v;
534 int i; 1668 int i;
535 char *p = buf.release; 1669 char *p = buf.release;
536 1670
537 if (uname (&buf)) 1671 if (uname (&buf))
538 return 0; 1672 return 0;
… …
562} 1696}
563 1697
564/*****************************************************************************/ 1698/*****************************************************************************/
565 1699
566#if EV_AVOID_STDIO 1700#if EV_AVOID_STDIO
567static void noinline 1701noinline ecb_cold
1702static void
568ev_printerr (const char *msg) 1703ev_printerr (const char *msg)
569{ 1704{
570 write (STDERR_FILENO, msg, strlen (msg)); 1705 write (STDERR_FILENO, msg, strlen (msg));
571} 1706}
572#endif 1707#endif
573 1708
574static void (*syserr_cb)(const char *msg); 1709static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
575 1710
1711ecb_cold
576void 1712void
577ev_set_syserr_cb (void (*cb)(const char *msg)) 1713ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
578{ 1714{
579 syserr_cb = cb; 1715 syserr_cb = cb;
580} 1716}
581 1717
582static void noinline 1718noinline ecb_cold
1719static void
583ev_syserr (const char *msg) 1720ev_syserr (const char *msg)
584{ 1721{
585 if (!msg) 1722 if (!msg)
586 msg = "(libev) system error"; 1723 msg = "(libev) system error";
587 1724
588 if (syserr_cb) 1725 if (syserr_cb)
589 syserr_cb (msg); 1726 syserr_cb (msg);
590 else 1727 else
591 { 1728 {
592#if EV_AVOID_STDIO 1729#if EV_AVOID_STDIO
593 const char *err = strerror (errno);
594
595 ev_printerr (msg); 1730 ev_printerr (msg);
596 ev_printerr (": "); 1731 ev_printerr (": ");
597 ev_printerr (err); 1732 ev_printerr (strerror (errno));
598 ev_printerr ("\n"); 1733 ev_printerr ("\n");
599#else 1734#else
600 perror (msg); 1735 perror (msg);
601#endif 1736#endif
602 abort (); 1737 abort ();
603 } 1738 }
604} 1739}
605 1740
606static void * 1741static void *
607ev_realloc_emul (void *ptr, long size) 1742ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
608{ 1743{
609#if __GLIBC__
610 return realloc (ptr, size);
611#else
612 /* some systems, notably openbsd and darwin, fail to properly 1744 /* some systems, notably openbsd and darwin, fail to properly
613 * implement realloc (x, 0) (as required by both ansi c-89 and 1745 * implement realloc (x, 0) (as required by both ansi c-89 and
614 * the single unix specification, so work around them here. 1746 * the single unix specification, so work around them here.
1747 * recently, also (at least) fedora and debian started breaking it,
1748 * despite documenting it otherwise.
615 */ 1749 */
616 1750
617 if (size) 1751 if (size)
618 return realloc (ptr, size); 1752 return realloc (ptr, size);
619 1753
620 free (ptr); 1754 free (ptr);
621 return 0; 1755 return 0;
622#endif
623} 1756}
624 1757
625static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1758static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
626 1759
1760ecb_cold
627void 1761void
628ev_set_allocator (void *(*cb)(void *ptr, long size)) 1762ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
629{ 1763{
630 alloc = cb; 1764 alloc = cb;
631} 1765}
632 1766
633inline_speed void * 1767inline_speed void *
… …
636 ptr = alloc (ptr, size); 1770 ptr = alloc (ptr, size);
637 1771
638 if (!ptr && size) 1772 if (!ptr && size)
639 { 1773 {
640#if EV_AVOID_STDIO 1774#if EV_AVOID_STDIO
641 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1775 ev_printerr ("(libev) memory allocation failed, aborting.\n");
642#else 1776#else
643 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1777 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
644#endif 1778#endif
645 abort (); 1779 abort ();
646 } 1780 }
647 1781
648 return ptr; 1782 return ptr;
… …
660typedef struct 1794typedef struct
661{ 1795{
662 WL head; 1796 WL head;
663 unsigned char events; /* the events watched for */ 1797 unsigned char events; /* the events watched for */
664 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1798 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
665 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1799 unsigned char emask; /* some backends store the actual kernel mask in here */
666 unsigned char unused; 1800 unsigned char unused;
667#if EV_USE_EPOLL 1801#if EV_USE_EPOLL
668 unsigned int egen; /* generation counter to counter epoll bugs */ 1802 unsigned int egen; /* generation counter to counter epoll bugs */
669#endif 1803#endif
670#if EV_SELECT_IS_WINSOCKET 1804#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
671 SOCKET handle; 1805 SOCKET handle;
1806#endif
1807#if EV_USE_IOCP
1808 OVERLAPPED or, ow;
672#endif 1809#endif
673} ANFD; 1810} ANFD;
674 1811
675/* stores the pending event set for a given watcher */ 1812/* stores the pending event set for a given watcher */
676typedef struct 1813typedef struct
… …
718 #undef VAR 1855 #undef VAR
719 }; 1856 };
720 #include "ev_wrap.h" 1857 #include "ev_wrap.h"
721 1858
722 static struct ev_loop default_loop_struct; 1859 static struct ev_loop default_loop_struct;
723 struct ev_loop *ev_default_loop_ptr; 1860 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
724 1861
725#else 1862#else
726 1863
727 ev_tstamp ev_rt_now; 1864 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
728 #define VAR(name,decl) static decl; 1865 #define VAR(name,decl) static decl;
729 #include "ev_vars.h" 1866 #include "ev_vars.h"
730 #undef VAR 1867 #undef VAR
731 1868
732 static int ev_default_loop_ptr; 1869 static int ev_default_loop_ptr;
… …
747 1884
748/*****************************************************************************/ 1885/*****************************************************************************/
749 1886
750#ifndef EV_HAVE_EV_TIME 1887#ifndef EV_HAVE_EV_TIME
751ev_tstamp 1888ev_tstamp
752ev_time (void) 1889ev_time (void) EV_NOEXCEPT
753{ 1890{
754#if EV_USE_REALTIME 1891#if EV_USE_REALTIME
755 if (expect_true (have_realtime)) 1892 if (expect_true (have_realtime))
756 { 1893 {
757 struct timespec ts; 1894 struct timespec ts;
… …
781 return ev_time (); 1918 return ev_time ();
782} 1919}
783 1920
784#if EV_MULTIPLICITY 1921#if EV_MULTIPLICITY
785ev_tstamp 1922ev_tstamp
786ev_now (EV_P) 1923ev_now (EV_P) EV_NOEXCEPT
787{ 1924{
788 return ev_rt_now; 1925 return ev_rt_now;
789} 1926}
790#endif 1927#endif
791 1928
792void 1929void
793ev_sleep (ev_tstamp delay) 1930ev_sleep (ev_tstamp delay) EV_NOEXCEPT
794{ 1931{
795 if (delay > 0.) 1932 if (delay > 0.)
796 { 1933 {
797#if EV_USE_NANOSLEEP 1934#if EV_USE_NANOSLEEP
798 struct timespec ts; 1935 struct timespec ts;
799 1936
800 EV_TS_SET (ts, delay); 1937 EV_TS_SET (ts, delay);
801 nanosleep (&ts, 0); 1938 nanosleep (&ts, 0);
802#elif defined(_WIN32) 1939#elif defined _WIN32
1940 /* maybe this should round up, as ms is very low resolution */
1941 /* compared to select (µs) or nanosleep (ns) */
803 Sleep ((unsigned long)(delay * 1e3)); 1942 Sleep ((unsigned long)(delay * 1e3));
804#else 1943#else
805 struct timeval tv; 1944 struct timeval tv;
806 1945
807 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1946 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
826 1965
827 do 1966 do
828 ncur <<= 1; 1967 ncur <<= 1;
829 while (cnt > ncur); 1968 while (cnt > ncur);
830 1969
831 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1970 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
832 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1971 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
833 { 1972 {
834 ncur *= elem; 1973 ncur *= elem;
835 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1974 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
836 ncur = ncur - sizeof (void *) * 4; 1975 ncur = ncur - sizeof (void *) * 4;
… …
838 } 1977 }
839 1978
840 return ncur; 1979 return ncur;
841} 1980}
842 1981
843static noinline void * 1982noinline ecb_cold
1983static void *
844array_realloc (int elem, void *base, int *cur, int cnt) 1984array_realloc (int elem, void *base, int *cur, int cnt)
845{ 1985{
846 *cur = array_nextsize (elem, *cur, cnt); 1986 *cur = array_nextsize (elem, *cur, cnt);
847 return ev_realloc (base, elem * *cur); 1987 return ev_realloc (base, elem * *cur);
848} 1988}
849 1989
1990#define array_needsize_noinit(base,count)
1991
850#define array_init_zero(base,count) \ 1992#define array_needsize_zerofill(base,count) \
851 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1993 memset ((void *)(base), 0, sizeof (*(base)) * (count))
852 1994
853#define array_needsize(type,base,cur,cnt,init) \ 1995#define array_needsize(type,base,cur,cnt,init) \
854 if (expect_false ((cnt) > (cur))) \ 1996 if (expect_false ((cnt) > (cur))) \
855 { \ 1997 { \
856 int ocur_ = (cur); \ 1998 ecb_unused int ocur_ = (cur); \
857 (base) = (type *)array_realloc \ 1999 (base) = (type *)array_realloc \
858 (sizeof (type), (base), &(cur), (cnt)); \ 2000 (sizeof (type), (base), &(cur), (cnt)); \
859 init ((base) + (ocur_), (cur) - ocur_); \ 2001 init ((base) + (ocur_), (cur) - ocur_); \
860 } 2002 }
861 2003
… …
873 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2015 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
874 2016
875/*****************************************************************************/ 2017/*****************************************************************************/
876 2018
877/* dummy callback for pending events */ 2019/* dummy callback for pending events */
878static void noinline 2020noinline
2021static void
879pendingcb (EV_P_ ev_prepare *w, int revents) 2022pendingcb (EV_P_ ev_prepare *w, int revents)
880{ 2023{
881} 2024}
882 2025
883void noinline 2026noinline
2027void
884ev_feed_event (EV_P_ void *w, int revents) 2028ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
885{ 2029{
886 W w_ = (W)w; 2030 W w_ = (W)w;
887 int pri = ABSPRI (w_); 2031 int pri = ABSPRI (w_);
888 2032
889 if (expect_false (w_->pending)) 2033 if (expect_false (w_->pending))
890 pendings [pri][w_->pending - 1].events |= revents; 2034 pendings [pri][w_->pending - 1].events |= revents;
891 else 2035 else
892 { 2036 {
893 w_->pending = ++pendingcnt [pri]; 2037 w_->pending = ++pendingcnt [pri];
894 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2038 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
895 pendings [pri][w_->pending - 1].w = w_; 2039 pendings [pri][w_->pending - 1].w = w_;
896 pendings [pri][w_->pending - 1].events = revents; 2040 pendings [pri][w_->pending - 1].events = revents;
897 } 2041 }
2042
2043 pendingpri = NUMPRI - 1;
898} 2044}
899 2045
900inline_speed void 2046inline_speed void
901feed_reverse (EV_P_ W w) 2047feed_reverse (EV_P_ W w)
902{ 2048{
903 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2049 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
904 rfeeds [rfeedcnt++] = w; 2050 rfeeds [rfeedcnt++] = w;
905} 2051}
906 2052
907inline_size void 2053inline_size void
908feed_reverse_done (EV_P_ int revents) 2054feed_reverse_done (EV_P_ int revents)
… …
948 if (expect_true (!anfd->reify)) 2094 if (expect_true (!anfd->reify))
949 fd_event_nocheck (EV_A_ fd, revents); 2095 fd_event_nocheck (EV_A_ fd, revents);
950} 2096}
951 2097
952void 2098void
953ev_feed_fd_event (EV_P_ int fd, int revents) 2099ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
954{ 2100{
955 if (fd >= 0 && fd < anfdmax) 2101 if (fd >= 0 && fd < anfdmax)
956 fd_event_nocheck (EV_A_ fd, revents); 2102 fd_event_nocheck (EV_A_ fd, revents);
957} 2103}
958 2104
… …
961inline_size void 2107inline_size void
962fd_reify (EV_P) 2108fd_reify (EV_P)
963{ 2109{
964 int i; 2110 int i;
965 2111
2112#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2113 for (i = 0; i < fdchangecnt; ++i)
2114 {
2115 int fd = fdchanges [i];
2116 ANFD *anfd = anfds + fd;
2117
2118 if (anfd->reify & EV__IOFDSET && anfd->head)
2119 {
2120 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2121
2122 if (handle != anfd->handle)
2123 {
2124 unsigned long arg;
2125
2126 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2127
2128 /* handle changed, but fd didn't - we need to do it in two steps */
2129 backend_modify (EV_A_ fd, anfd->events, 0);
2130 anfd->events = 0;
2131 anfd->handle = handle;
2132 }
2133 }
2134 }
2135#endif
2136
966 for (i = 0; i < fdchangecnt; ++i) 2137 for (i = 0; i < fdchangecnt; ++i)
967 { 2138 {
968 int fd = fdchanges [i]; 2139 int fd = fdchanges [i];
969 ANFD *anfd = anfds + fd; 2140 ANFD *anfd = anfds + fd;
970 ev_io *w; 2141 ev_io *w;
… …
972 unsigned char o_events = anfd->events; 2143 unsigned char o_events = anfd->events;
973 unsigned char o_reify = anfd->reify; 2144 unsigned char o_reify = anfd->reify;
974 2145
975 anfd->reify = 0; 2146 anfd->reify = 0;
976 2147
977#if EV_SELECT_IS_WINSOCKET
978 if (o_reify & EV__IOFDSET)
979 {
980 unsigned long arg;
981 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
982 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
983 }
984#endif
985
986 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2148 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
987 { 2149 {
988 anfd->events = 0; 2150 anfd->events = 0;
989 2151
990 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2152 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1000 2162
1001 fdchangecnt = 0; 2163 fdchangecnt = 0;
1002} 2164}
1003 2165
1004/* something about the given fd changed */ 2166/* something about the given fd changed */
1005inline_size void 2167inline_size
2168void
1006fd_change (EV_P_ int fd, int flags) 2169fd_change (EV_P_ int fd, int flags)
1007{ 2170{
1008 unsigned char reify = anfds [fd].reify; 2171 unsigned char reify = anfds [fd].reify;
1009 anfds [fd].reify |= flags; 2172 anfds [fd].reify |= flags;
1010 2173
1011 if (expect_true (!reify)) 2174 if (expect_true (!reify))
1012 { 2175 {
1013 ++fdchangecnt; 2176 ++fdchangecnt;
1014 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2177 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1015 fdchanges [fdchangecnt - 1] = fd; 2178 fdchanges [fdchangecnt - 1] = fd;
1016 } 2179 }
1017} 2180}
1018 2181
1019/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2182/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1020inline_speed void 2183inline_speed ecb_cold void
1021fd_kill (EV_P_ int fd) 2184fd_kill (EV_P_ int fd)
1022{ 2185{
1023 ev_io *w; 2186 ev_io *w;
1024 2187
1025 while ((w = (ev_io *)anfds [fd].head)) 2188 while ((w = (ev_io *)anfds [fd].head))
… …
1028 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2191 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1029 } 2192 }
1030} 2193}
1031 2194
1032/* check whether the given fd is actually valid, for error recovery */ 2195/* check whether the given fd is actually valid, for error recovery */
1033inline_size int 2196inline_size ecb_cold int
1034fd_valid (int fd) 2197fd_valid (int fd)
1035{ 2198{
1036#ifdef _WIN32 2199#ifdef _WIN32
1037 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2200 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1038#else 2201#else
1039 return fcntl (fd, F_GETFD) != -1; 2202 return fcntl (fd, F_GETFD) != -1;
1040#endif 2203#endif
1041} 2204}
1042 2205
1043/* called on EBADF to verify fds */ 2206/* called on EBADF to verify fds */
1044static void noinline 2207noinline ecb_cold
2208static void
1045fd_ebadf (EV_P) 2209fd_ebadf (EV_P)
1046{ 2210{
1047 int fd; 2211 int fd;
1048 2212
1049 for (fd = 0; fd < anfdmax; ++fd) 2213 for (fd = 0; fd < anfdmax; ++fd)
… …
1051 if (!fd_valid (fd) && errno == EBADF) 2215 if (!fd_valid (fd) && errno == EBADF)
1052 fd_kill (EV_A_ fd); 2216 fd_kill (EV_A_ fd);
1053} 2217}
1054 2218
1055/* called on ENOMEM in select/poll to kill some fds and retry */ 2219/* called on ENOMEM in select/poll to kill some fds and retry */
1056static void noinline 2220noinline ecb_cold
2221static void
1057fd_enomem (EV_P) 2222fd_enomem (EV_P)
1058{ 2223{
1059 int fd; 2224 int fd;
1060 2225
1061 for (fd = anfdmax; fd--; ) 2226 for (fd = anfdmax; fd--; )
… …
1065 break; 2230 break;
1066 } 2231 }
1067} 2232}
1068 2233
1069/* usually called after fork if backend needs to re-arm all fds from scratch */ 2234/* usually called after fork if backend needs to re-arm all fds from scratch */
1070static void noinline 2235noinline
2236static void
1071fd_rearm_all (EV_P) 2237fd_rearm_all (EV_P)
1072{ 2238{
1073 int fd; 2239 int fd;
1074 2240
1075 for (fd = 0; fd < anfdmax; ++fd) 2241 for (fd = 0; fd < anfdmax; ++fd)
… …
1256 2422
1257/*****************************************************************************/ 2423/*****************************************************************************/
1258 2424
1259#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2425#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1260 2426
1261static void noinline 2427noinline ecb_cold
2428static void
1262evpipe_init (EV_P) 2429evpipe_init (EV_P)
1263{ 2430{
1264 if (!ev_is_active (&pipe_w)) 2431 if (!ev_is_active (&pipe_w))
1265 { 2432 {
2433 int fds [2];
2434
1266# if EV_USE_EVENTFD 2435# if EV_USE_EVENTFD
2436 fds [0] = -1;
1267 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2437 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1268 if (evfd < 0 && errno == EINVAL) 2438 if (fds [1] < 0 && errno == EINVAL)
1269 evfd = eventfd (0, 0); 2439 fds [1] = eventfd (0, 0);
1270 2440
1271 if (evfd >= 0) 2441 if (fds [1] < 0)
2442# endif
1272 { 2443 {
2444 while (pipe (fds))
2445 ev_syserr ("(libev) error creating signal/async pipe");
2446
2447 fd_intern (fds [0]);
2448 }
2449
1273 evpipe [0] = -1; 2450 evpipe [0] = fds [0];
1274 fd_intern (evfd); /* doing it twice doesn't hurt */ 2451
1275 ev_io_set (&pipe_w, evfd, EV_READ); 2452 if (evpipe [1] < 0)
2453 evpipe [1] = fds [1]; /* first call, set write fd */
2454 else
2455 {
2456 /* on subsequent calls, do not change evpipe [1] */
2457 /* so that evpipe_write can always rely on its value. */
2458 /* this branch does not do anything sensible on windows, */
2459 /* so must not be executed on windows */
2460
2461 dup2 (fds [1], evpipe [1]);
2462 close (fds [1]);
2463 }
2464
2465 fd_intern (evpipe [1]);
2466
2467 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2468 ev_io_start (EV_A_ &pipe_w);
2469 ev_unref (EV_A); /* watcher should not keep loop alive */
2470 }
2471}
2472
2473inline_speed void
2474evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2475{
2476 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2477
2478 if (expect_true (*flag))
2479 return;
2480
2481 *flag = 1;
2482 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2483
2484 pipe_write_skipped = 1;
2485
2486 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2487
2488 if (pipe_write_wanted)
2489 {
2490 int old_errno;
2491
2492 pipe_write_skipped = 0;
2493 ECB_MEMORY_FENCE_RELEASE;
2494
2495 old_errno = errno; /* save errno because write will clobber it */
2496
2497#if EV_USE_EVENTFD
2498 if (evpipe [0] < 0)
2499 {
2500 uint64_t counter = 1;
2501 write (evpipe [1], &counter, sizeof (uint64_t));
1276 } 2502 }
1277 else 2503 else
1278# endif 2504#endif
1279 { 2505 {
1280 while (pipe (evpipe)) 2506#ifdef _WIN32
1281 ev_syserr ("(libev) error creating signal/async pipe"); 2507 WSABUF buf;
1282 2508 DWORD sent;
1283 fd_intern (evpipe [0]); 2509 buf.buf = (char *)&buf;
1284 fd_intern (evpipe [1]); 2510 buf.len = 1;
1285 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2511 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2512#else
2513 write (evpipe [1], &(evpipe [1]), 1);
2514#endif
1286 } 2515 }
1287
1288 ev_io_start (EV_A_ &pipe_w);
1289 ev_unref (EV_A); /* watcher should not keep loop alive */
1290 }
1291}
1292
1293inline_size void
1294evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1295{
1296 if (!*flag)
1297 {
1298 int old_errno = errno; /* save errno because write might clobber it */
1299 char dummy;
1300
1301 *flag = 1;
1302
1303#if EV_USE_EVENTFD
1304 if (evfd >= 0)
1305 {
1306 uint64_t counter = 1;
1307 write (evfd, &counter, sizeof (uint64_t));
1308 }
1309 else
1310#endif
1311 /* win32 people keep sending patches that change this write() to send() */
1312 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1313 /* so when you think this write should be a send instead, please find out */
1314 /* where your send() is from - it's definitely not the microsoft send, and */
1315 /* tell me. thank you. */
1316 write (evpipe [1], &dummy, 1);
1317 2516
1318 errno = old_errno; 2517 errno = old_errno;
1319 } 2518 }
1320} 2519}
1321 2520
… …
1324static void 2523static void
1325pipecb (EV_P_ ev_io *iow, int revents) 2524pipecb (EV_P_ ev_io *iow, int revents)
1326{ 2525{
1327 int i; 2526 int i;
1328 2527
2528 if (revents & EV_READ)
2529 {
1329#if EV_USE_EVENTFD 2530#if EV_USE_EVENTFD
1330 if (evfd >= 0) 2531 if (evpipe [0] < 0)
1331 { 2532 {
1332 uint64_t counter; 2533 uint64_t counter;
1333 read (evfd, &counter, sizeof (uint64_t)); 2534 read (evpipe [1], &counter, sizeof (uint64_t));
1334 } 2535 }
1335 else 2536 else
1336#endif 2537#endif
1337 { 2538 {
1338 char dummy; 2539 char dummy[4];
1339 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2540#ifdef _WIN32
2541 WSABUF buf;
2542 DWORD recvd;
2543 DWORD flags = 0;
2544 buf.buf = dummy;
2545 buf.len = sizeof (dummy);
2546 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2547#else
1340 read (evpipe [0], &dummy, 1); 2548 read (evpipe [0], &dummy, sizeof (dummy));
2549#endif
2550 }
1341 } 2551 }
1342 2552
2553 pipe_write_skipped = 0;
2554
2555 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2556
2557#if EV_SIGNAL_ENABLE
1343 if (sig_pending) 2558 if (sig_pending)
1344 { 2559 {
1345 sig_pending = 0; 2560 sig_pending = 0;
2561
2562 ECB_MEMORY_FENCE;
1346 2563
1347 for (i = EV_NSIG - 1; i--; ) 2564 for (i = EV_NSIG - 1; i--; )
1348 if (expect_false (signals [i].pending)) 2565 if (expect_false (signals [i].pending))
1349 ev_feed_signal_event (EV_A_ i + 1); 2566 ev_feed_signal_event (EV_A_ i + 1);
1350 } 2567 }
2568#endif
1351 2569
1352#if EV_ASYNC_ENABLE 2570#if EV_ASYNC_ENABLE
1353 if (async_pending) 2571 if (async_pending)
1354 { 2572 {
1355 async_pending = 0; 2573 async_pending = 0;
2574
2575 ECB_MEMORY_FENCE;
1356 2576
1357 for (i = asynccnt; i--; ) 2577 for (i = asynccnt; i--; )
1358 if (asyncs [i]->sent) 2578 if (asyncs [i]->sent)
1359 { 2579 {
1360 asyncs [i]->sent = 0; 2580 asyncs [i]->sent = 0;
2581 ECB_MEMORY_FENCE_RELEASE;
1361 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2582 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1362 } 2583 }
1363 } 2584 }
1364#endif 2585#endif
1365} 2586}
1366 2587
1367/*****************************************************************************/ 2588/*****************************************************************************/
1368 2589
2590void
2591ev_feed_signal (int signum) EV_NOEXCEPT
2592{
2593#if EV_MULTIPLICITY
2594 EV_P;
2595 ECB_MEMORY_FENCE_ACQUIRE;
2596 EV_A = signals [signum - 1].loop;
2597
2598 if (!EV_A)
2599 return;
2600#endif
2601
2602 signals [signum - 1].pending = 1;
2603 evpipe_write (EV_A_ &sig_pending);
2604}
2605
1369static void 2606static void
1370ev_sighandler (int signum) 2607ev_sighandler (int signum)
1371{ 2608{
1372#if EV_MULTIPLICITY
1373 EV_P = signals [signum - 1].loop;
1374#endif
1375
1376#ifdef _WIN32 2609#ifdef _WIN32
1377 signal (signum, ev_sighandler); 2610 signal (signum, ev_sighandler);
1378#endif 2611#endif
1379 2612
1380 signals [signum - 1].pending = 1; 2613 ev_feed_signal (signum);
1381 evpipe_write (EV_A_ &sig_pending);
1382} 2614}
1383 2615
1384void noinline 2616noinline
2617void
1385ev_feed_signal_event (EV_P_ int signum) 2618ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1386{ 2619{
1387 WL w; 2620 WL w;
1388 2621
1389 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2622 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1390 return; 2623 return;
1391 2624
1392 --signum; 2625 --signum;
1393 2626
1394#if EV_MULTIPLICITY 2627#if EV_MULTIPLICITY
… …
1398 if (expect_false (signals [signum].loop != EV_A)) 2631 if (expect_false (signals [signum].loop != EV_A))
1399 return; 2632 return;
1400#endif 2633#endif
1401 2634
1402 signals [signum].pending = 0; 2635 signals [signum].pending = 0;
2636 ECB_MEMORY_FENCE_RELEASE;
1403 2637
1404 for (w = signals [signum].head; w; w = w->next) 2638 for (w = signals [signum].head; w; w = w->next)
1405 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2639 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1406} 2640}
1407 2641
… …
1486 2720
1487#endif 2721#endif
1488 2722
1489/*****************************************************************************/ 2723/*****************************************************************************/
1490 2724
2725#if EV_USE_IOCP
2726# include "ev_iocp.c"
2727#endif
1491#if EV_USE_PORT 2728#if EV_USE_PORT
1492# include "ev_port.c" 2729# include "ev_port.c"
1493#endif 2730#endif
1494#if EV_USE_KQUEUE 2731#if EV_USE_KQUEUE
1495# include "ev_kqueue.c" 2732# include "ev_kqueue.c"
1496#endif 2733#endif
2734#if EV_USE_LINUXAIO
2735# include "ev_linuxaio.c"
2736#endif
1497#if EV_USE_EPOLL 2737#if EV_USE_EPOLL
1498# include "ev_epoll.c" 2738# include "ev_epoll.c"
1499#endif 2739#endif
1500#if EV_USE_POLL 2740#if EV_USE_POLL
1501# include "ev_poll.c" 2741# include "ev_poll.c"
1502#endif 2742#endif
1503#if EV_USE_SELECT 2743#if EV_USE_SELECT
1504# include "ev_select.c" 2744# include "ev_select.c"
1505#endif 2745#endif
1506 2746
1507int 2747ecb_cold int
1508ev_version_major (void) 2748ev_version_major (void) EV_NOEXCEPT
1509{ 2749{
1510 return EV_VERSION_MAJOR; 2750 return EV_VERSION_MAJOR;
1511} 2751}
1512 2752
1513int 2753ecb_cold int
1514ev_version_minor (void) 2754ev_version_minor (void) EV_NOEXCEPT
1515{ 2755{
1516 return EV_VERSION_MINOR; 2756 return EV_VERSION_MINOR;
1517} 2757}
1518 2758
1519/* return true if we are running with elevated privileges and should ignore env variables */ 2759/* return true if we are running with elevated privileges and should ignore env variables */
1520int inline_size 2760inline_size ecb_cold int
1521enable_secure (void) 2761enable_secure (void)
1522{ 2762{
1523#ifdef _WIN32 2763#ifdef _WIN32
1524 return 0; 2764 return 0;
1525#else 2765#else
1526 return getuid () != geteuid () 2766 return getuid () != geteuid ()
1527 || getgid () != getegid (); 2767 || getgid () != getegid ();
1528#endif 2768#endif
1529} 2769}
1530 2770
2771ecb_cold
1531unsigned int 2772unsigned int
1532ev_supported_backends (void) 2773ev_supported_backends (void) EV_NOEXCEPT
1533{ 2774{
1534 unsigned int flags = 0; 2775 unsigned int flags = 0;
1535 2776
1536 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2777 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1537 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2778 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1538 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2779 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2780 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1539 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2781 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1540 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2782 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1541 2783
1542 return flags; 2784 return flags;
1543} 2785}
1544 2786
2787ecb_cold
1545unsigned int 2788unsigned int
1546ev_recommended_backends (void) 2789ev_recommended_backends (void) EV_NOEXCEPT
1547{ 2790{
1548 unsigned int flags = ev_supported_backends (); 2791 unsigned int flags = ev_supported_backends ();
1549 2792
1550#ifndef __NetBSD__ 2793#ifndef __NetBSD__
1551 /* kqueue is borked on everything but netbsd apparently */ 2794 /* kqueue is borked on everything but netbsd apparently */
… …
1559#endif 2802#endif
1560#ifdef __FreeBSD__ 2803#ifdef __FreeBSD__
1561 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2804 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1562#endif 2805#endif
1563 2806
2807 /* TODO: linuxaio is very experimental */
2808 flags &= ~EVBACKEND_LINUXAIO;
2809
1564 return flags; 2810 return flags;
1565} 2811}
1566 2812
2813ecb_cold
1567unsigned int 2814unsigned int
1568ev_embeddable_backends (void) 2815ev_embeddable_backends (void) EV_NOEXCEPT
1569{ 2816{
1570 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2817 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1571 2818
1572 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2819 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1573 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2820 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1575 2822
1576 return flags; 2823 return flags;
1577} 2824}
1578 2825
1579unsigned int 2826unsigned int
1580ev_backend (EV_P) 2827ev_backend (EV_P) EV_NOEXCEPT
1581{ 2828{
1582 return backend; 2829 return backend;
1583} 2830}
1584 2831
1585#if EV_FEATURE_API 2832#if EV_FEATURE_API
1586unsigned int 2833unsigned int
1587ev_iteration (EV_P) 2834ev_iteration (EV_P) EV_NOEXCEPT
1588{ 2835{
1589 return loop_count; 2836 return loop_count;
1590} 2837}
1591 2838
1592unsigned int 2839unsigned int
1593ev_depth (EV_P) 2840ev_depth (EV_P) EV_NOEXCEPT
1594{ 2841{
1595 return loop_depth; 2842 return loop_depth;
1596} 2843}
1597 2844
1598void 2845void
1599ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2846ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1600{ 2847{
1601 io_blocktime = interval; 2848 io_blocktime = interval;
1602} 2849}
1603 2850
1604void 2851void
1605ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2852ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1606{ 2853{
1607 timeout_blocktime = interval; 2854 timeout_blocktime = interval;
1608} 2855}
1609 2856
1610void 2857void
1611ev_set_userdata (EV_P_ void *data) 2858ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1612{ 2859{
1613 userdata = data; 2860 userdata = data;
1614} 2861}
1615 2862
1616void * 2863void *
1617ev_userdata (EV_P) 2864ev_userdata (EV_P) EV_NOEXCEPT
1618{ 2865{
1619 return userdata; 2866 return userdata;
1620} 2867}
1621 2868
2869void
1622void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2870ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1623{ 2871{
1624 invoke_cb = invoke_pending_cb; 2872 invoke_cb = invoke_pending_cb;
1625} 2873}
1626 2874
2875void
1627void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2876ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1628{ 2877{
1629 release_cb = release; 2878 release_cb = release;
1630 acquire_cb = acquire; 2879 acquire_cb = acquire;
1631} 2880}
1632#endif 2881#endif
1633 2882
1634/* initialise a loop structure, must be zero-initialised */ 2883/* initialise a loop structure, must be zero-initialised */
1635static void noinline 2884noinline ecb_cold
2885static void
1636loop_init (EV_P_ unsigned int flags) 2886loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1637{ 2887{
1638 if (!backend) 2888 if (!backend)
1639 { 2889 {
2890 origflags = flags;
2891
1640#if EV_USE_REALTIME 2892#if EV_USE_REALTIME
1641 if (!have_realtime) 2893 if (!have_realtime)
1642 { 2894 {
1643 struct timespec ts; 2895 struct timespec ts;
1644 2896
… …
1666 if (!(flags & EVFLAG_NOENV) 2918 if (!(flags & EVFLAG_NOENV)
1667 && !enable_secure () 2919 && !enable_secure ()
1668 && getenv ("LIBEV_FLAGS")) 2920 && getenv ("LIBEV_FLAGS"))
1669 flags = atoi (getenv ("LIBEV_FLAGS")); 2921 flags = atoi (getenv ("LIBEV_FLAGS"));
1670 2922
1671 ev_rt_now = ev_time (); 2923 ev_rt_now = ev_time ();
1672 mn_now = get_clock (); 2924 mn_now = get_clock ();
1673 now_floor = mn_now; 2925 now_floor = mn_now;
1674 rtmn_diff = ev_rt_now - mn_now; 2926 rtmn_diff = ev_rt_now - mn_now;
1675#if EV_FEATURE_API 2927#if EV_FEATURE_API
1676 invoke_cb = ev_invoke_pending; 2928 invoke_cb = ev_invoke_pending;
1677#endif 2929#endif
1678 2930
1679 io_blocktime = 0.; 2931 io_blocktime = 0.;
1680 timeout_blocktime = 0.; 2932 timeout_blocktime = 0.;
1681 backend = 0; 2933 backend = 0;
1682 backend_fd = -1; 2934 backend_fd = -1;
1683 sig_pending = 0; 2935 sig_pending = 0;
1684#if EV_ASYNC_ENABLE 2936#if EV_ASYNC_ENABLE
1685 async_pending = 0; 2937 async_pending = 0;
1686#endif 2938#endif
2939 pipe_write_skipped = 0;
2940 pipe_write_wanted = 0;
2941 evpipe [0] = -1;
2942 evpipe [1] = -1;
1687#if EV_USE_INOTIFY 2943#if EV_USE_INOTIFY
1688 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2944 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1689#endif 2945#endif
1690#if EV_USE_SIGNALFD 2946#if EV_USE_SIGNALFD
1691 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2947 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1692#endif 2948#endif
1693 2949
1694 if (!(flags & 0x0000ffffU)) 2950 if (!(flags & EVBACKEND_MASK))
1695 flags |= ev_recommended_backends (); 2951 flags |= ev_recommended_backends ();
1696 2952
2953#if EV_USE_IOCP
2954 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2955#endif
1697#if EV_USE_PORT 2956#if EV_USE_PORT
1698 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2957 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1699#endif 2958#endif
1700#if EV_USE_KQUEUE 2959#if EV_USE_KQUEUE
1701 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2960 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2961#endif
2962#if EV_USE_LINUXAIO
2963 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1702#endif 2964#endif
1703#if EV_USE_EPOLL 2965#if EV_USE_EPOLL
1704 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2966 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1705#endif 2967#endif
1706#if EV_USE_POLL 2968#if EV_USE_POLL
1707 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2969 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1708#endif 2970#endif
1709#if EV_USE_SELECT 2971#if EV_USE_SELECT
1710 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2972 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1711#endif 2973#endif
1712 2974
1713 ev_prepare_init (&pending_w, pendingcb); 2975 ev_prepare_init (&pending_w, pendingcb);
1714 2976
1715#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2977#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1718#endif 2980#endif
1719 } 2981 }
1720} 2982}
1721 2983
1722/* free up a loop structure */ 2984/* free up a loop structure */
1723static void noinline 2985ecb_cold
2986void
1724loop_destroy (EV_P) 2987ev_loop_destroy (EV_P)
1725{ 2988{
1726 int i; 2989 int i;
2990
2991#if EV_MULTIPLICITY
2992 /* mimic free (0) */
2993 if (!EV_A)
2994 return;
2995#endif
2996
2997#if EV_CLEANUP_ENABLE
2998 /* queue cleanup watchers (and execute them) */
2999 if (expect_false (cleanupcnt))
3000 {
3001 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3002 EV_INVOKE_PENDING;
3003 }
3004#endif
3005
3006#if EV_CHILD_ENABLE
3007 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3008 {
3009 ev_ref (EV_A); /* child watcher */
3010 ev_signal_stop (EV_A_ &childev);
3011 }
3012#endif
1727 3013
1728 if (ev_is_active (&pipe_w)) 3014 if (ev_is_active (&pipe_w))
1729 { 3015 {
1730 /*ev_ref (EV_A);*/ 3016 /*ev_ref (EV_A);*/
1731 /*ev_io_stop (EV_A_ &pipe_w);*/ 3017 /*ev_io_stop (EV_A_ &pipe_w);*/
1732 3018
1733#if EV_USE_EVENTFD
1734 if (evfd >= 0)
1735 close (evfd);
1736#endif
1737
1738 if (evpipe [0] >= 0)
1739 {
1740 EV_WIN32_CLOSE_FD (evpipe [0]); 3019 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1741 EV_WIN32_CLOSE_FD (evpipe [1]); 3020 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1742 }
1743 } 3021 }
1744 3022
1745#if EV_USE_SIGNALFD 3023#if EV_USE_SIGNALFD
1746 if (ev_is_active (&sigfd_w)) 3024 if (ev_is_active (&sigfd_w))
1747 close (sigfd); 3025 close (sigfd);
… …
1753#endif 3031#endif
1754 3032
1755 if (backend_fd >= 0) 3033 if (backend_fd >= 0)
1756 close (backend_fd); 3034 close (backend_fd);
1757 3035
3036#if EV_USE_IOCP
3037 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3038#endif
1758#if EV_USE_PORT 3039#if EV_USE_PORT
1759 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3040 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1760#endif 3041#endif
1761#if EV_USE_KQUEUE 3042#if EV_USE_KQUEUE
1762 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3043 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3044#endif
3045#if EV_USE_LINUXAIO
3046 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1763#endif 3047#endif
1764#if EV_USE_EPOLL 3048#if EV_USE_EPOLL
1765 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3049 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1766#endif 3050#endif
1767#if EV_USE_POLL 3051#if EV_USE_POLL
1768 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3052 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1769#endif 3053#endif
1770#if EV_USE_SELECT 3054#if EV_USE_SELECT
1771 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3055 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1772#endif 3056#endif
1773 3057
1774 for (i = NUMPRI; i--; ) 3058 for (i = NUMPRI; i--; )
1775 { 3059 {
1776 array_free (pending, [i]); 3060 array_free (pending, [i]);
… …
1789 array_free (periodic, EMPTY); 3073 array_free (periodic, EMPTY);
1790#endif 3074#endif
1791#if EV_FORK_ENABLE 3075#if EV_FORK_ENABLE
1792 array_free (fork, EMPTY); 3076 array_free (fork, EMPTY);
1793#endif 3077#endif
3078#if EV_CLEANUP_ENABLE
3079 array_free (cleanup, EMPTY);
3080#endif
1794 array_free (prepare, EMPTY); 3081 array_free (prepare, EMPTY);
1795 array_free (check, EMPTY); 3082 array_free (check, EMPTY);
1796#if EV_ASYNC_ENABLE 3083#if EV_ASYNC_ENABLE
1797 array_free (async, EMPTY); 3084 array_free (async, EMPTY);
1798#endif 3085#endif
1799 3086
1800 backend = 0; 3087 backend = 0;
3088
3089#if EV_MULTIPLICITY
3090 if (ev_is_default_loop (EV_A))
3091#endif
3092 ev_default_loop_ptr = 0;
3093#if EV_MULTIPLICITY
3094 else
3095 ev_free (EV_A);
3096#endif
1801} 3097}
1802 3098
1803#if EV_USE_INOTIFY 3099#if EV_USE_INOTIFY
1804inline_size void infy_fork (EV_P); 3100inline_size void infy_fork (EV_P);
1805#endif 3101#endif
1806 3102
1807inline_size void 3103inline_size void
1808loop_fork (EV_P) 3104loop_fork (EV_P)
1809{ 3105{
1810#if EV_USE_PORT 3106#if EV_USE_PORT
1811 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3107 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1812#endif 3108#endif
1813#if EV_USE_KQUEUE 3109#if EV_USE_KQUEUE
1814 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3110 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3111#endif
3112#if EV_USE_LINUXAIO
3113 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1815#endif 3114#endif
1816#if EV_USE_EPOLL 3115#if EV_USE_EPOLL
1817 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3116 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1818#endif 3117#endif
1819#if EV_USE_INOTIFY 3118#if EV_USE_INOTIFY
1820 infy_fork (EV_A); 3119 infy_fork (EV_A);
1821#endif 3120#endif
1822 3121
3122#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1823 if (ev_is_active (&pipe_w)) 3123 if (ev_is_active (&pipe_w) && postfork != 2)
1824 { 3124 {
1825 /* this "locks" the handlers against writing to the pipe */ 3125 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1826 /* while we modify the fd vars */
1827 sig_pending = 1;
1828#if EV_ASYNC_ENABLE
1829 async_pending = 1;
1830#endif
1831 3126
1832 ev_ref (EV_A); 3127 ev_ref (EV_A);
1833 ev_io_stop (EV_A_ &pipe_w); 3128 ev_io_stop (EV_A_ &pipe_w);
1834 3129
1835#if EV_USE_EVENTFD
1836 if (evfd >= 0)
1837 close (evfd);
1838#endif
1839
1840 if (evpipe [0] >= 0) 3130 if (evpipe [0] >= 0)
1841 {
1842 EV_WIN32_CLOSE_FD (evpipe [0]); 3131 EV_WIN32_CLOSE_FD (evpipe [0]);
1843 EV_WIN32_CLOSE_FD (evpipe [1]);
1844 }
1845 3132
1846#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1847 evpipe_init (EV_A); 3133 evpipe_init (EV_A);
1848 /* now iterate over everything, in case we missed something */ 3134 /* iterate over everything, in case we missed something before */
1849 pipecb (EV_A_ &pipe_w, EV_READ); 3135 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1850#endif
1851 } 3136 }
3137#endif
1852 3138
1853 postfork = 0; 3139 postfork = 0;
1854} 3140}
1855 3141
1856#if EV_MULTIPLICITY 3142#if EV_MULTIPLICITY
1857 3143
3144ecb_cold
1858struct ev_loop * 3145struct ev_loop *
1859ev_loop_new (unsigned int flags) 3146ev_loop_new (unsigned int flags) EV_NOEXCEPT
1860{ 3147{
1861 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3148 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1862 3149
1863 memset (EV_A, 0, sizeof (struct ev_loop)); 3150 memset (EV_A, 0, sizeof (struct ev_loop));
1864 loop_init (EV_A_ flags); 3151 loop_init (EV_A_ flags);
1865 3152
1866 if (ev_backend (EV_A)) 3153 if (ev_backend (EV_A))
1867 return EV_A; 3154 return EV_A;
1868 3155
3156 ev_free (EV_A);
1869 return 0; 3157 return 0;
1870} 3158}
1871 3159
1872void
1873ev_loop_destroy (EV_P)
1874{
1875 loop_destroy (EV_A);
1876 ev_free (loop);
1877}
1878
1879void
1880ev_loop_fork (EV_P)
1881{
1882 postfork = 1; /* must be in line with ev_default_fork */
1883}
1884#endif /* multiplicity */ 3160#endif /* multiplicity */
1885 3161
1886#if EV_VERIFY 3162#if EV_VERIFY
1887static void noinline 3163noinline ecb_cold
3164static void
1888verify_watcher (EV_P_ W w) 3165verify_watcher (EV_P_ W w)
1889{ 3166{
1890 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3167 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1891 3168
1892 if (w->pending) 3169 if (w->pending)
1893 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3170 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1894} 3171}
1895 3172
1896static void noinline 3173noinline ecb_cold
3174static void
1897verify_heap (EV_P_ ANHE *heap, int N) 3175verify_heap (EV_P_ ANHE *heap, int N)
1898{ 3176{
1899 int i; 3177 int i;
1900 3178
1901 for (i = HEAP0; i < N + HEAP0; ++i) 3179 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1906 3184
1907 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3185 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1908 } 3186 }
1909} 3187}
1910 3188
1911static void noinline 3189noinline ecb_cold
3190static void
1912array_verify (EV_P_ W *ws, int cnt) 3191array_verify (EV_P_ W *ws, int cnt)
1913{ 3192{
1914 while (cnt--) 3193 while (cnt--)
1915 { 3194 {
1916 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3195 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1918 } 3197 }
1919} 3198}
1920#endif 3199#endif
1921 3200
1922#if EV_FEATURE_API 3201#if EV_FEATURE_API
1923void 3202void ecb_cold
1924ev_verify (EV_P) 3203ev_verify (EV_P) EV_NOEXCEPT
1925{ 3204{
1926#if EV_VERIFY 3205#if EV_VERIFY
1927 int i; 3206 int i;
1928 WL w; 3207 WL w, w2;
1929 3208
1930 assert (activecnt >= -1); 3209 assert (activecnt >= -1);
1931 3210
1932 assert (fdchangemax >= fdchangecnt); 3211 assert (fdchangemax >= fdchangecnt);
1933 for (i = 0; i < fdchangecnt; ++i) 3212 for (i = 0; i < fdchangecnt; ++i)
1934 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3213 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1935 3214
1936 assert (anfdmax >= 0); 3215 assert (anfdmax >= 0);
1937 for (i = 0; i < anfdmax; ++i) 3216 for (i = 0; i < anfdmax; ++i)
3217 {
3218 int j = 0;
3219
1938 for (w = anfds [i].head; w; w = w->next) 3220 for (w = w2 = anfds [i].head; w; w = w->next)
1939 { 3221 {
1940 verify_watcher (EV_A_ (W)w); 3222 verify_watcher (EV_A_ (W)w);
3223
3224 if (j++ & 1)
3225 {
3226 assert (("libev: io watcher list contains a loop", w != w2));
3227 w2 = w2->next;
3228 }
3229
1941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3230 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3231 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1943 } 3232 }
3233 }
1944 3234
1945 assert (timermax >= timercnt); 3235 assert (timermax >= timercnt);
1946 verify_heap (EV_A_ timers, timercnt); 3236 verify_heap (EV_A_ timers, timercnt);
1947 3237
1948#if EV_PERIODIC_ENABLE 3238#if EV_PERIODIC_ENABLE
… …
1963#if EV_FORK_ENABLE 3253#if EV_FORK_ENABLE
1964 assert (forkmax >= forkcnt); 3254 assert (forkmax >= forkcnt);
1965 array_verify (EV_A_ (W *)forks, forkcnt); 3255 array_verify (EV_A_ (W *)forks, forkcnt);
1966#endif 3256#endif
1967 3257
3258#if EV_CLEANUP_ENABLE
3259 assert (cleanupmax >= cleanupcnt);
3260 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3261#endif
3262
1968#if EV_ASYNC_ENABLE 3263#if EV_ASYNC_ENABLE
1969 assert (asyncmax >= asynccnt); 3264 assert (asyncmax >= asynccnt);
1970 array_verify (EV_A_ (W *)asyncs, asynccnt); 3265 array_verify (EV_A_ (W *)asyncs, asynccnt);
1971#endif 3266#endif
1972 3267
… …
1989#endif 3284#endif
1990} 3285}
1991#endif 3286#endif
1992 3287
1993#if EV_MULTIPLICITY 3288#if EV_MULTIPLICITY
3289ecb_cold
1994struct ev_loop * 3290struct ev_loop *
1995ev_default_loop_init (unsigned int flags)
1996#else 3291#else
1997int 3292int
3293#endif
1998ev_default_loop (unsigned int flags) 3294ev_default_loop (unsigned int flags) EV_NOEXCEPT
1999#endif
2000{ 3295{
2001 if (!ev_default_loop_ptr) 3296 if (!ev_default_loop_ptr)
2002 { 3297 {
2003#if EV_MULTIPLICITY 3298#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr = &default_loop_struct; 3299 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2023 3318
2024 return ev_default_loop_ptr; 3319 return ev_default_loop_ptr;
2025} 3320}
2026 3321
2027void 3322void
2028ev_default_destroy (void) 3323ev_loop_fork (EV_P) EV_NOEXCEPT
2029{ 3324{
2030#if EV_MULTIPLICITY 3325 postfork = 1;
2031 EV_P = ev_default_loop_ptr;
2032#endif
2033
2034 ev_default_loop_ptr = 0;
2035
2036#if EV_CHILD_ENABLE
2037 ev_ref (EV_A); /* child watcher */
2038 ev_signal_stop (EV_A_ &childev);
2039#endif
2040
2041 loop_destroy (EV_A);
2042}
2043
2044void
2045ev_default_fork (void)
2046{
2047#if EV_MULTIPLICITY
2048 EV_P = ev_default_loop_ptr;
2049#endif
2050
2051 postfork = 1; /* must be in line with ev_loop_fork */
2052} 3326}
2053 3327
2054/*****************************************************************************/ 3328/*****************************************************************************/
2055 3329
2056void 3330void
… …
2058{ 3332{
2059 EV_CB_INVOKE ((W)w, revents); 3333 EV_CB_INVOKE ((W)w, revents);
2060} 3334}
2061 3335
2062unsigned int 3336unsigned int
2063ev_pending_count (EV_P) 3337ev_pending_count (EV_P) EV_NOEXCEPT
2064{ 3338{
2065 int pri; 3339 int pri;
2066 unsigned int count = 0; 3340 unsigned int count = 0;
2067 3341
2068 for (pri = NUMPRI; pri--; ) 3342 for (pri = NUMPRI; pri--; )
2069 count += pendingcnt [pri]; 3343 count += pendingcnt [pri];
2070 3344
2071 return count; 3345 return count;
2072} 3346}
2073 3347
2074void noinline 3348noinline
3349void
2075ev_invoke_pending (EV_P) 3350ev_invoke_pending (EV_P)
2076{ 3351{
2077 int pri; 3352 pendingpri = NUMPRI;
2078 3353
2079 for (pri = NUMPRI; pri--; ) 3354 do
3355 {
3356 --pendingpri;
3357
3358 /* pendingpri possibly gets modified in the inner loop */
2080 while (pendingcnt [pri]) 3359 while (pendingcnt [pendingpri])
2081 { 3360 {
2082 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3361 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2083 3362
2084 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2085 /* ^ this is no longer true, as pending_w could be here */
2086
2087 p->w->pending = 0; 3363 p->w->pending = 0;
2088 EV_CB_INVOKE (p->w, p->events); 3364 EV_CB_INVOKE (p->w, p->events);
2089 EV_FREQUENT_CHECK; 3365 EV_FREQUENT_CHECK;
2090 } 3366 }
3367 }
3368 while (pendingpri);
2091} 3369}
2092 3370
2093#if EV_IDLE_ENABLE 3371#if EV_IDLE_ENABLE
2094/* make idle watchers pending. this handles the "call-idle */ 3372/* make idle watchers pending. this handles the "call-idle */
2095/* only when higher priorities are idle" logic */ 3373/* only when higher priorities are idle" logic */
… …
2152 feed_reverse_done (EV_A_ EV_TIMER); 3430 feed_reverse_done (EV_A_ EV_TIMER);
2153 } 3431 }
2154} 3432}
2155 3433
2156#if EV_PERIODIC_ENABLE 3434#if EV_PERIODIC_ENABLE
3435
3436noinline
3437static void
3438periodic_recalc (EV_P_ ev_periodic *w)
3439{
3440 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3441 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3442
3443 /* the above almost always errs on the low side */
3444 while (at <= ev_rt_now)
3445 {
3446 ev_tstamp nat = at + w->interval;
3447
3448 /* when resolution fails us, we use ev_rt_now */
3449 if (expect_false (nat == at))
3450 {
3451 at = ev_rt_now;
3452 break;
3453 }
3454
3455 at = nat;
3456 }
3457
3458 ev_at (w) = at;
3459}
3460
2157/* make periodics pending */ 3461/* make periodics pending */
2158inline_size void 3462inline_size void
2159periodics_reify (EV_P) 3463periodics_reify (EV_P)
2160{ 3464{
2161 EV_FREQUENT_CHECK; 3465 EV_FREQUENT_CHECK;
2162 3466
2163 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3467 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2164 { 3468 {
2165 int feed_count = 0;
2166
2167 do 3469 do
2168 { 3470 {
2169 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3471 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2170 3472
2171 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3473 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2180 ANHE_at_cache (periodics [HEAP0]); 3482 ANHE_at_cache (periodics [HEAP0]);
2181 downheap (periodics, periodiccnt, HEAP0); 3483 downheap (periodics, periodiccnt, HEAP0);
2182 } 3484 }
2183 else if (w->interval) 3485 else if (w->interval)
2184 { 3486 {
2185 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3487 periodic_recalc (EV_A_ w);
2186 /* if next trigger time is not sufficiently in the future, put it there */
2187 /* this might happen because of floating point inexactness */
2188 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2189 {
2190 ev_at (w) += w->interval;
2191
2192 /* if interval is unreasonably low we might still have a time in the past */
2193 /* so correct this. this will make the periodic very inexact, but the user */
2194 /* has effectively asked to get triggered more often than possible */
2195 if (ev_at (w) < ev_rt_now)
2196 ev_at (w) = ev_rt_now;
2197 }
2198
2199 ANHE_at_cache (periodics [HEAP0]); 3488 ANHE_at_cache (periodics [HEAP0]);
2200 downheap (periodics, periodiccnt, HEAP0); 3489 downheap (periodics, periodiccnt, HEAP0);
2201 } 3490 }
2202 else 3491 else
2203 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3492 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2211 } 3500 }
2212} 3501}
2213 3502
2214/* simply recalculate all periodics */ 3503/* simply recalculate all periodics */
2215/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3504/* TODO: maybe ensure that at least one event happens when jumping forward? */
2216static void noinline 3505noinline ecb_cold
3506static void
2217periodics_reschedule (EV_P) 3507periodics_reschedule (EV_P)
2218{ 3508{
2219 int i; 3509 int i;
2220 3510
2221 /* adjust periodics after time jump */ 3511 /* adjust periodics after time jump */
… …
2224 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3514 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2225 3515
2226 if (w->reschedule_cb) 3516 if (w->reschedule_cb)
2227 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3517 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2228 else if (w->interval) 3518 else if (w->interval)
2229 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3519 periodic_recalc (EV_A_ w);
2230 3520
2231 ANHE_at_cache (periodics [i]); 3521 ANHE_at_cache (periodics [i]);
2232 } 3522 }
2233 3523
2234 reheap (periodics, periodiccnt); 3524 reheap (periodics, periodiccnt);
2235} 3525}
2236#endif 3526#endif
2237 3527
2238/* adjust all timers by a given offset */ 3528/* adjust all timers by a given offset */
2239static void noinline 3529noinline ecb_cold
3530static void
2240timers_reschedule (EV_P_ ev_tstamp adjust) 3531timers_reschedule (EV_P_ ev_tstamp adjust)
2241{ 3532{
2242 int i; 3533 int i;
2243 3534
2244 for (i = 0; i < timercnt; ++i) 3535 for (i = 0; i < timercnt; ++i)
… …
2281 * doesn't hurt either as we only do this on time-jumps or 3572 * doesn't hurt either as we only do this on time-jumps or
2282 * in the unlikely event of having been preempted here. 3573 * in the unlikely event of having been preempted here.
2283 */ 3574 */
2284 for (i = 4; --i; ) 3575 for (i = 4; --i; )
2285 { 3576 {
3577 ev_tstamp diff;
2286 rtmn_diff = ev_rt_now - mn_now; 3578 rtmn_diff = ev_rt_now - mn_now;
2287 3579
3580 diff = odiff - rtmn_diff;
3581
2288 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3582 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2289 return; /* all is well */ 3583 return; /* all is well */
2290 3584
2291 ev_rt_now = ev_time (); 3585 ev_rt_now = ev_time ();
2292 mn_now = get_clock (); 3586 mn_now = get_clock ();
2293 now_floor = mn_now; 3587 now_floor = mn_now;
… …
2315 3609
2316 mn_now = ev_rt_now; 3610 mn_now = ev_rt_now;
2317 } 3611 }
2318} 3612}
2319 3613
2320void 3614int
2321ev_run (EV_P_ int flags) 3615ev_run (EV_P_ int flags)
2322{ 3616{
2323#if EV_FEATURE_API 3617#if EV_FEATURE_API
2324 ++loop_depth; 3618 ++loop_depth;
2325#endif 3619#endif
… …
2383 ev_tstamp prev_mn_now = mn_now; 3677 ev_tstamp prev_mn_now = mn_now;
2384 3678
2385 /* update time to cancel out callback processing overhead */ 3679 /* update time to cancel out callback processing overhead */
2386 time_update (EV_A_ 1e100); 3680 time_update (EV_A_ 1e100);
2387 3681
3682 /* from now on, we want a pipe-wake-up */
3683 pipe_write_wanted = 1;
3684
3685 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3686
2388 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3687 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2389 { 3688 {
2390 waittime = MAX_BLOCKTIME; 3689 waittime = MAX_BLOCKTIME;
2391 3690
2392 if (timercnt) 3691 if (timercnt)
2393 { 3692 {
2394 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3693 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2395 if (waittime > to) waittime = to; 3694 if (waittime > to) waittime = to;
2396 } 3695 }
2397 3696
2398#if EV_PERIODIC_ENABLE 3697#if EV_PERIODIC_ENABLE
2399 if (periodiccnt) 3698 if (periodiccnt)
2400 { 3699 {
2401 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3700 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2402 if (waittime > to) waittime = to; 3701 if (waittime > to) waittime = to;
2403 } 3702 }
2404#endif 3703#endif
2405 3704
2406 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3705 /* don't let timeouts decrease the waittime below timeout_blocktime */
2407 if (expect_false (waittime < timeout_blocktime)) 3706 if (expect_false (waittime < timeout_blocktime))
2408 waittime = timeout_blocktime; 3707 waittime = timeout_blocktime;
3708
3709 /* at this point, we NEED to wait, so we have to ensure */
3710 /* to pass a minimum nonzero value to the backend */
3711 if (expect_false (waittime < backend_mintime))
3712 waittime = backend_mintime;
2409 3713
2410 /* extra check because io_blocktime is commonly 0 */ 3714 /* extra check because io_blocktime is commonly 0 */
2411 if (expect_false (io_blocktime)) 3715 if (expect_false (io_blocktime))
2412 { 3716 {
2413 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3717 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2414 3718
2415 if (sleeptime > waittime - backend_fudge) 3719 if (sleeptime > waittime - backend_mintime)
2416 sleeptime = waittime - backend_fudge; 3720 sleeptime = waittime - backend_mintime;
2417 3721
2418 if (expect_true (sleeptime > 0.)) 3722 if (expect_true (sleeptime > 0.))
2419 { 3723 {
2420 ev_sleep (sleeptime); 3724 ev_sleep (sleeptime);
2421 waittime -= sleeptime; 3725 waittime -= sleeptime;
… …
2428#endif 3732#endif
2429 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3733 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2430 backend_poll (EV_A_ waittime); 3734 backend_poll (EV_A_ waittime);
2431 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3735 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2432 3736
3737 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3738
3739 ECB_MEMORY_FENCE_ACQUIRE;
3740 if (pipe_write_skipped)
3741 {
3742 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3743 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3744 }
3745
3746
2433 /* update ev_rt_now, do magic */ 3747 /* update ev_rt_now, do magic */
2434 time_update (EV_A_ waittime + sleeptime); 3748 time_update (EV_A_ waittime + sleeptime);
2435 } 3749 }
2436 3750
2437 /* queue pending timers and reschedule them */ 3751 /* queue pending timers and reschedule them */
… …
2463 loop_done = EVBREAK_CANCEL; 3777 loop_done = EVBREAK_CANCEL;
2464 3778
2465#if EV_FEATURE_API 3779#if EV_FEATURE_API
2466 --loop_depth; 3780 --loop_depth;
2467#endif 3781#endif
2468}
2469 3782
3783 return activecnt;
3784}
3785
2470void 3786void
2471ev_break (EV_P_ int how) 3787ev_break (EV_P_ int how) EV_NOEXCEPT
2472{ 3788{
2473 loop_done = how; 3789 loop_done = how;
2474} 3790}
2475 3791
2476void 3792void
2477ev_ref (EV_P) 3793ev_ref (EV_P) EV_NOEXCEPT
2478{ 3794{
2479 ++activecnt; 3795 ++activecnt;
2480} 3796}
2481 3797
2482void 3798void
2483ev_unref (EV_P) 3799ev_unref (EV_P) EV_NOEXCEPT
2484{ 3800{
2485 --activecnt; 3801 --activecnt;
2486} 3802}
2487 3803
2488void 3804void
2489ev_now_update (EV_P) 3805ev_now_update (EV_P) EV_NOEXCEPT
2490{ 3806{
2491 time_update (EV_A_ 1e100); 3807 time_update (EV_A_ 1e100);
2492} 3808}
2493 3809
2494void 3810void
2495ev_suspend (EV_P) 3811ev_suspend (EV_P) EV_NOEXCEPT
2496{ 3812{
2497 ev_now_update (EV_A); 3813 ev_now_update (EV_A);
2498} 3814}
2499 3815
2500void 3816void
2501ev_resume (EV_P) 3817ev_resume (EV_P) EV_NOEXCEPT
2502{ 3818{
2503 ev_tstamp mn_prev = mn_now; 3819 ev_tstamp mn_prev = mn_now;
2504 3820
2505 ev_now_update (EV_A); 3821 ev_now_update (EV_A);
2506 timers_reschedule (EV_A_ mn_now - mn_prev); 3822 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2545 w->pending = 0; 3861 w->pending = 0;
2546 } 3862 }
2547} 3863}
2548 3864
2549int 3865int
2550ev_clear_pending (EV_P_ void *w) 3866ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2551{ 3867{
2552 W w_ = (W)w; 3868 W w_ = (W)w;
2553 int pending = w_->pending; 3869 int pending = w_->pending;
2554 3870
2555 if (expect_true (pending)) 3871 if (expect_true (pending))
… …
2587 w->active = 0; 3903 w->active = 0;
2588} 3904}
2589 3905
2590/*****************************************************************************/ 3906/*****************************************************************************/
2591 3907
2592void noinline 3908noinline
3909void
2593ev_io_start (EV_P_ ev_io *w) 3910ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2594{ 3911{
2595 int fd = w->fd; 3912 int fd = w->fd;
2596 3913
2597 if (expect_false (ev_is_active (w))) 3914 if (expect_false (ev_is_active (w)))
2598 return; 3915 return;
… …
2601 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3918 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2602 3919
2603 EV_FREQUENT_CHECK; 3920 EV_FREQUENT_CHECK;
2604 3921
2605 ev_start (EV_A_ (W)w, 1); 3922 ev_start (EV_A_ (W)w, 1);
2606 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3923 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2607 wlist_add (&anfds[fd].head, (WL)w); 3924 wlist_add (&anfds[fd].head, (WL)w);
3925
3926 /* common bug, apparently */
3927 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2608 3928
2609 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3929 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2610 w->events &= ~EV__IOFDSET; 3930 w->events &= ~EV__IOFDSET;
2611 3931
2612 EV_FREQUENT_CHECK; 3932 EV_FREQUENT_CHECK;
2613} 3933}
2614 3934
2615void noinline 3935noinline
3936void
2616ev_io_stop (EV_P_ ev_io *w) 3937ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2617{ 3938{
2618 clear_pending (EV_A_ (W)w); 3939 clear_pending (EV_A_ (W)w);
2619 if (expect_false (!ev_is_active (w))) 3940 if (expect_false (!ev_is_active (w)))
2620 return; 3941 return;
2621 3942
… …
2629 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3950 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2630 3951
2631 EV_FREQUENT_CHECK; 3952 EV_FREQUENT_CHECK;
2632} 3953}
2633 3954
2634void noinline 3955noinline
3956void
2635ev_timer_start (EV_P_ ev_timer *w) 3957ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2636{ 3958{
2637 if (expect_false (ev_is_active (w))) 3959 if (expect_false (ev_is_active (w)))
2638 return; 3960 return;
2639 3961
2640 ev_at (w) += mn_now; 3962 ev_at (w) += mn_now;
… …
2643 3965
2644 EV_FREQUENT_CHECK; 3966 EV_FREQUENT_CHECK;
2645 3967
2646 ++timercnt; 3968 ++timercnt;
2647 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3969 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2648 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3970 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2649 ANHE_w (timers [ev_active (w)]) = (WT)w; 3971 ANHE_w (timers [ev_active (w)]) = (WT)w;
2650 ANHE_at_cache (timers [ev_active (w)]); 3972 ANHE_at_cache (timers [ev_active (w)]);
2651 upheap (timers, ev_active (w)); 3973 upheap (timers, ev_active (w));
2652 3974
2653 EV_FREQUENT_CHECK; 3975 EV_FREQUENT_CHECK;
2654 3976
2655 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3977 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2656} 3978}
2657 3979
2658void noinline 3980noinline
3981void
2659ev_timer_stop (EV_P_ ev_timer *w) 3982ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2660{ 3983{
2661 clear_pending (EV_A_ (W)w); 3984 clear_pending (EV_A_ (W)w);
2662 if (expect_false (!ev_is_active (w))) 3985 if (expect_false (!ev_is_active (w)))
2663 return; 3986 return;
2664 3987
… …
2683 ev_stop (EV_A_ (W)w); 4006 ev_stop (EV_A_ (W)w);
2684 4007
2685 EV_FREQUENT_CHECK; 4008 EV_FREQUENT_CHECK;
2686} 4009}
2687 4010
2688void noinline 4011noinline
4012void
2689ev_timer_again (EV_P_ ev_timer *w) 4013ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2690{ 4014{
2691 EV_FREQUENT_CHECK; 4015 EV_FREQUENT_CHECK;
4016
4017 clear_pending (EV_A_ (W)w);
2692 4018
2693 if (ev_is_active (w)) 4019 if (ev_is_active (w))
2694 { 4020 {
2695 if (w->repeat) 4021 if (w->repeat)
2696 { 4022 {
… …
2709 4035
2710 EV_FREQUENT_CHECK; 4036 EV_FREQUENT_CHECK;
2711} 4037}
2712 4038
2713ev_tstamp 4039ev_tstamp
2714ev_timer_remaining (EV_P_ ev_timer *w) 4040ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2715{ 4041{
2716 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4042 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2717} 4043}
2718 4044
2719#if EV_PERIODIC_ENABLE 4045#if EV_PERIODIC_ENABLE
2720void noinline 4046noinline
4047void
2721ev_periodic_start (EV_P_ ev_periodic *w) 4048ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2722{ 4049{
2723 if (expect_false (ev_is_active (w))) 4050 if (expect_false (ev_is_active (w)))
2724 return; 4051 return;
2725 4052
2726 if (w->reschedule_cb) 4053 if (w->reschedule_cb)
2727 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4054 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2728 else if (w->interval) 4055 else if (w->interval)
2729 { 4056 {
2730 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4057 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2731 /* this formula differs from the one in periodic_reify because we do not always round up */ 4058 periodic_recalc (EV_A_ w);
2732 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2733 } 4059 }
2734 else 4060 else
2735 ev_at (w) = w->offset; 4061 ev_at (w) = w->offset;
2736 4062
2737 EV_FREQUENT_CHECK; 4063 EV_FREQUENT_CHECK;
2738 4064
2739 ++periodiccnt; 4065 ++periodiccnt;
2740 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4066 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2741 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4067 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2742 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4068 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2743 ANHE_at_cache (periodics [ev_active (w)]); 4069 ANHE_at_cache (periodics [ev_active (w)]);
2744 upheap (periodics, ev_active (w)); 4070 upheap (periodics, ev_active (w));
2745 4071
2746 EV_FREQUENT_CHECK; 4072 EV_FREQUENT_CHECK;
2747 4073
2748 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4074 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2749} 4075}
2750 4076
2751void noinline 4077noinline
4078void
2752ev_periodic_stop (EV_P_ ev_periodic *w) 4079ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2753{ 4080{
2754 clear_pending (EV_A_ (W)w); 4081 clear_pending (EV_A_ (W)w);
2755 if (expect_false (!ev_is_active (w))) 4082 if (expect_false (!ev_is_active (w)))
2756 return; 4083 return;
2757 4084
… …
2774 ev_stop (EV_A_ (W)w); 4101 ev_stop (EV_A_ (W)w);
2775 4102
2776 EV_FREQUENT_CHECK; 4103 EV_FREQUENT_CHECK;
2777} 4104}
2778 4105
2779void noinline 4106noinline
4107void
2780ev_periodic_again (EV_P_ ev_periodic *w) 4108ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2781{ 4109{
2782 /* TODO: use adjustheap and recalculation */ 4110 /* TODO: use adjustheap and recalculation */
2783 ev_periodic_stop (EV_A_ w); 4111 ev_periodic_stop (EV_A_ w);
2784 ev_periodic_start (EV_A_ w); 4112 ev_periodic_start (EV_A_ w);
2785} 4113}
… …
2789# define SA_RESTART 0 4117# define SA_RESTART 0
2790#endif 4118#endif
2791 4119
2792#if EV_SIGNAL_ENABLE 4120#if EV_SIGNAL_ENABLE
2793 4121
2794void noinline 4122noinline
4123void
2795ev_signal_start (EV_P_ ev_signal *w) 4124ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2796{ 4125{
2797 if (expect_false (ev_is_active (w))) 4126 if (expect_false (ev_is_active (w)))
2798 return; 4127 return;
2799 4128
2800 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4129 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2802#if EV_MULTIPLICITY 4131#if EV_MULTIPLICITY
2803 assert (("libev: a signal must not be attached to two different loops", 4132 assert (("libev: a signal must not be attached to two different loops",
2804 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4133 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2805 4134
2806 signals [w->signum - 1].loop = EV_A; 4135 signals [w->signum - 1].loop = EV_A;
4136 ECB_MEMORY_FENCE_RELEASE;
2807#endif 4137#endif
2808 4138
2809 EV_FREQUENT_CHECK; 4139 EV_FREQUENT_CHECK;
2810 4140
2811#if EV_USE_SIGNALFD 4141#if EV_USE_SIGNALFD
… …
2858 sa.sa_handler = ev_sighandler; 4188 sa.sa_handler = ev_sighandler;
2859 sigfillset (&sa.sa_mask); 4189 sigfillset (&sa.sa_mask);
2860 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4190 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2861 sigaction (w->signum, &sa, 0); 4191 sigaction (w->signum, &sa, 0);
2862 4192
4193 if (origflags & EVFLAG_NOSIGMASK)
4194 {
2863 sigemptyset (&sa.sa_mask); 4195 sigemptyset (&sa.sa_mask);
2864 sigaddset (&sa.sa_mask, w->signum); 4196 sigaddset (&sa.sa_mask, w->signum);
2865 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4197 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4198 }
2866#endif 4199#endif
2867 } 4200 }
2868 4201
2869 EV_FREQUENT_CHECK; 4202 EV_FREQUENT_CHECK;
2870} 4203}
2871 4204
2872void noinline 4205noinline
4206void
2873ev_signal_stop (EV_P_ ev_signal *w) 4207ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2874{ 4208{
2875 clear_pending (EV_A_ (W)w); 4209 clear_pending (EV_A_ (W)w);
2876 if (expect_false (!ev_is_active (w))) 4210 if (expect_false (!ev_is_active (w)))
2877 return; 4211 return;
2878 4212
… …
2909#endif 4243#endif
2910 4244
2911#if EV_CHILD_ENABLE 4245#if EV_CHILD_ENABLE
2912 4246
2913void 4247void
2914ev_child_start (EV_P_ ev_child *w) 4248ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2915{ 4249{
2916#if EV_MULTIPLICITY 4250#if EV_MULTIPLICITY
2917 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4251 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2918#endif 4252#endif
2919 if (expect_false (ev_is_active (w))) 4253 if (expect_false (ev_is_active (w)))
… …
2926 4260
2927 EV_FREQUENT_CHECK; 4261 EV_FREQUENT_CHECK;
2928} 4262}
2929 4263
2930void 4264void
2931ev_child_stop (EV_P_ ev_child *w) 4265ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2932{ 4266{
2933 clear_pending (EV_A_ (W)w); 4267 clear_pending (EV_A_ (W)w);
2934 if (expect_false (!ev_is_active (w))) 4268 if (expect_false (!ev_is_active (w)))
2935 return; 4269 return;
2936 4270
… …
2953 4287
2954#define DEF_STAT_INTERVAL 5.0074891 4288#define DEF_STAT_INTERVAL 5.0074891
2955#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4289#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2956#define MIN_STAT_INTERVAL 0.1074891 4290#define MIN_STAT_INTERVAL 0.1074891
2957 4291
2958static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4292noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2959 4293
2960#if EV_USE_INOTIFY 4294#if EV_USE_INOTIFY
2961 4295
2962/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4296/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2963# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4297# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2964 4298
2965static void noinline 4299noinline
4300static void
2966infy_add (EV_P_ ev_stat *w) 4301infy_add (EV_P_ ev_stat *w)
2967{ 4302{
2968 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); 4303 w->wd = inotify_add_watch (fs_fd, w->path,
4304 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4305 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4306 | IN_DONT_FOLLOW | IN_MASK_ADD);
2969 4307
2970 if (w->wd >= 0) 4308 if (w->wd >= 0)
2971 { 4309 {
2972 struct statfs sfs; 4310 struct statfs sfs;
2973 4311
… …
2977 4315
2978 if (!fs_2625) 4316 if (!fs_2625)
2979 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4317 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2980 else if (!statfs (w->path, &sfs) 4318 else if (!statfs (w->path, &sfs)
2981 && (sfs.f_type == 0x1373 /* devfs */ 4319 && (sfs.f_type == 0x1373 /* devfs */
4320 || sfs.f_type == 0x4006 /* fat */
4321 || sfs.f_type == 0x4d44 /* msdos */
2982 || sfs.f_type == 0xEF53 /* ext2/3 */ 4322 || sfs.f_type == 0xEF53 /* ext2/3 */
4323 || sfs.f_type == 0x72b6 /* jffs2 */
4324 || sfs.f_type == 0x858458f6 /* ramfs */
4325 || sfs.f_type == 0x5346544e /* ntfs */
2983 || sfs.f_type == 0x3153464a /* jfs */ 4326 || sfs.f_type == 0x3153464a /* jfs */
4327 || sfs.f_type == 0x9123683e /* btrfs */
2984 || sfs.f_type == 0x52654973 /* reiser3 */ 4328 || sfs.f_type == 0x52654973 /* reiser3 */
2985 || sfs.f_type == 0x01021994 /* tempfs */ 4329 || sfs.f_type == 0x01021994 /* tmpfs */
2986 || sfs.f_type == 0x58465342 /* xfs */)) 4330 || sfs.f_type == 0x58465342 /* xfs */))
2987 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4331 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2988 else 4332 else
2989 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4333 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2990 } 4334 }
… …
3011 if (!pend || pend == path) 4355 if (!pend || pend == path)
3012 break; 4356 break;
3013 4357
3014 *pend = 0; 4358 *pend = 0;
3015 w->wd = inotify_add_watch (fs_fd, path, mask); 4359 w->wd = inotify_add_watch (fs_fd, path, mask);
3016 } 4360 }
3017 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4361 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3018 } 4362 }
3019 } 4363 }
3020 4364
3021 if (w->wd >= 0) 4365 if (w->wd >= 0)
… …
3025 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4369 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3026 ev_timer_again (EV_A_ &w->timer); 4370 ev_timer_again (EV_A_ &w->timer);
3027 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4371 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3028} 4372}
3029 4373
3030static void noinline 4374noinline
4375static void
3031infy_del (EV_P_ ev_stat *w) 4376infy_del (EV_P_ ev_stat *w)
3032{ 4377{
3033 int slot; 4378 int slot;
3034 int wd = w->wd; 4379 int wd = w->wd;
3035 4380
… …
3042 4387
3043 /* remove this watcher, if others are watching it, they will rearm */ 4388 /* remove this watcher, if others are watching it, they will rearm */
3044 inotify_rm_watch (fs_fd, wd); 4389 inotify_rm_watch (fs_fd, wd);
3045} 4390}
3046 4391
3047static void noinline 4392noinline
4393static void
3048infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4394infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3049{ 4395{
3050 if (slot < 0) 4396 if (slot < 0)
3051 /* overflow, need to check for all hash slots */ 4397 /* overflow, need to check for all hash slots */
3052 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4398 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3088 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4434 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3089 ofs += sizeof (struct inotify_event) + ev->len; 4435 ofs += sizeof (struct inotify_event) + ev->len;
3090 } 4436 }
3091} 4437}
3092 4438
3093inline_size void 4439inline_size ecb_cold
4440void
3094ev_check_2625 (EV_P) 4441ev_check_2625 (EV_P)
3095{ 4442{
3096 /* kernels < 2.6.25 are borked 4443 /* kernels < 2.6.25 are borked
3097 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4444 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3098 */ 4445 */
… …
3103} 4450}
3104 4451
3105inline_size int 4452inline_size int
3106infy_newfd (void) 4453infy_newfd (void)
3107{ 4454{
3108#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4455#if defined IN_CLOEXEC && defined IN_NONBLOCK
3109 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4456 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3110 if (fd >= 0) 4457 if (fd >= 0)
3111 return fd; 4458 return fd;
3112#endif 4459#endif
3113 return inotify_init (); 4460 return inotify_init ();
… …
3188#else 4535#else
3189# define EV_LSTAT(p,b) lstat (p, b) 4536# define EV_LSTAT(p,b) lstat (p, b)
3190#endif 4537#endif
3191 4538
3192void 4539void
3193ev_stat_stat (EV_P_ ev_stat *w) 4540ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3194{ 4541{
3195 if (lstat (w->path, &w->attr) < 0) 4542 if (lstat (w->path, &w->attr) < 0)
3196 w->attr.st_nlink = 0; 4543 w->attr.st_nlink = 0;
3197 else if (!w->attr.st_nlink) 4544 else if (!w->attr.st_nlink)
3198 w->attr.st_nlink = 1; 4545 w->attr.st_nlink = 1;
3199} 4546}
3200 4547
3201static void noinline 4548noinline
4549static void
3202stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4550stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3203{ 4551{
3204 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4552 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3205 4553
3206 ev_statdata prev = w->attr; 4554 ev_statdata prev = w->attr;
… …
3237 ev_feed_event (EV_A_ w, EV_STAT); 4585 ev_feed_event (EV_A_ w, EV_STAT);
3238 } 4586 }
3239} 4587}
3240 4588
3241void 4589void
3242ev_stat_start (EV_P_ ev_stat *w) 4590ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3243{ 4591{
3244 if (expect_false (ev_is_active (w))) 4592 if (expect_false (ev_is_active (w)))
3245 return; 4593 return;
3246 4594
3247 ev_stat_stat (EV_A_ w); 4595 ev_stat_stat (EV_A_ w);
… …
3268 4616
3269 EV_FREQUENT_CHECK; 4617 EV_FREQUENT_CHECK;
3270} 4618}
3271 4619
3272void 4620void
3273ev_stat_stop (EV_P_ ev_stat *w) 4621ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3274{ 4622{
3275 clear_pending (EV_A_ (W)w); 4623 clear_pending (EV_A_ (W)w);
3276 if (expect_false (!ev_is_active (w))) 4624 if (expect_false (!ev_is_active (w)))
3277 return; 4625 return;
3278 4626
… …
3294} 4642}
3295#endif 4643#endif
3296 4644
3297#if EV_IDLE_ENABLE 4645#if EV_IDLE_ENABLE
3298void 4646void
3299ev_idle_start (EV_P_ ev_idle *w) 4647ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3300{ 4648{
3301 if (expect_false (ev_is_active (w))) 4649 if (expect_false (ev_is_active (w)))
3302 return; 4650 return;
3303 4651
3304 pri_adjust (EV_A_ (W)w); 4652 pri_adjust (EV_A_ (W)w);
… …
3309 int active = ++idlecnt [ABSPRI (w)]; 4657 int active = ++idlecnt [ABSPRI (w)];
3310 4658
3311 ++idleall; 4659 ++idleall;
3312 ev_start (EV_A_ (W)w, active); 4660 ev_start (EV_A_ (W)w, active);
3313 4661
3314 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4662 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3315 idles [ABSPRI (w)][active - 1] = w; 4663 idles [ABSPRI (w)][active - 1] = w;
3316 } 4664 }
3317 4665
3318 EV_FREQUENT_CHECK; 4666 EV_FREQUENT_CHECK;
3319} 4667}
3320 4668
3321void 4669void
3322ev_idle_stop (EV_P_ ev_idle *w) 4670ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3323{ 4671{
3324 clear_pending (EV_A_ (W)w); 4672 clear_pending (EV_A_ (W)w);
3325 if (expect_false (!ev_is_active (w))) 4673 if (expect_false (!ev_is_active (w)))
3326 return; 4674 return;
3327 4675
… …
3341} 4689}
3342#endif 4690#endif
3343 4691
3344#if EV_PREPARE_ENABLE 4692#if EV_PREPARE_ENABLE
3345void 4693void
3346ev_prepare_start (EV_P_ ev_prepare *w) 4694ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3347{ 4695{
3348 if (expect_false (ev_is_active (w))) 4696 if (expect_false (ev_is_active (w)))
3349 return; 4697 return;
3350 4698
3351 EV_FREQUENT_CHECK; 4699 EV_FREQUENT_CHECK;
3352 4700
3353 ev_start (EV_A_ (W)w, ++preparecnt); 4701 ev_start (EV_A_ (W)w, ++preparecnt);
3354 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4702 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3355 prepares [preparecnt - 1] = w; 4703 prepares [preparecnt - 1] = w;
3356 4704
3357 EV_FREQUENT_CHECK; 4705 EV_FREQUENT_CHECK;
3358} 4706}
3359 4707
3360void 4708void
3361ev_prepare_stop (EV_P_ ev_prepare *w) 4709ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3362{ 4710{
3363 clear_pending (EV_A_ (W)w); 4711 clear_pending (EV_A_ (W)w);
3364 if (expect_false (!ev_is_active (w))) 4712 if (expect_false (!ev_is_active (w)))
3365 return; 4713 return;
3366 4714
… …
3379} 4727}
3380#endif 4728#endif
3381 4729
3382#if EV_CHECK_ENABLE 4730#if EV_CHECK_ENABLE
3383void 4731void
3384ev_check_start (EV_P_ ev_check *w) 4732ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3385{ 4733{
3386 if (expect_false (ev_is_active (w))) 4734 if (expect_false (ev_is_active (w)))
3387 return; 4735 return;
3388 4736
3389 EV_FREQUENT_CHECK; 4737 EV_FREQUENT_CHECK;
3390 4738
3391 ev_start (EV_A_ (W)w, ++checkcnt); 4739 ev_start (EV_A_ (W)w, ++checkcnt);
3392 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4740 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3393 checks [checkcnt - 1] = w; 4741 checks [checkcnt - 1] = w;
3394 4742
3395 EV_FREQUENT_CHECK; 4743 EV_FREQUENT_CHECK;
3396} 4744}
3397 4745
3398void 4746void
3399ev_check_stop (EV_P_ ev_check *w) 4747ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3400{ 4748{
3401 clear_pending (EV_A_ (W)w); 4749 clear_pending (EV_A_ (W)w);
3402 if (expect_false (!ev_is_active (w))) 4750 if (expect_false (!ev_is_active (w)))
3403 return; 4751 return;
3404 4752
… …
3416 EV_FREQUENT_CHECK; 4764 EV_FREQUENT_CHECK;
3417} 4765}
3418#endif 4766#endif
3419 4767
3420#if EV_EMBED_ENABLE 4768#if EV_EMBED_ENABLE
3421void noinline 4769noinline
4770void
3422ev_embed_sweep (EV_P_ ev_embed *w) 4771ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3423{ 4772{
3424 ev_run (w->other, EVRUN_NOWAIT); 4773 ev_run (w->other, EVRUN_NOWAIT);
3425} 4774}
3426 4775
3427static void 4776static void
… …
3475 ev_idle_stop (EV_A_ idle); 4824 ev_idle_stop (EV_A_ idle);
3476} 4825}
3477#endif 4826#endif
3478 4827
3479void 4828void
3480ev_embed_start (EV_P_ ev_embed *w) 4829ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3481{ 4830{
3482 if (expect_false (ev_is_active (w))) 4831 if (expect_false (ev_is_active (w)))
3483 return; 4832 return;
3484 4833
3485 { 4834 {
… …
3506 4855
3507 EV_FREQUENT_CHECK; 4856 EV_FREQUENT_CHECK;
3508} 4857}
3509 4858
3510void 4859void
3511ev_embed_stop (EV_P_ ev_embed *w) 4860ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3512{ 4861{
3513 clear_pending (EV_A_ (W)w); 4862 clear_pending (EV_A_ (W)w);
3514 if (expect_false (!ev_is_active (w))) 4863 if (expect_false (!ev_is_active (w)))
3515 return; 4864 return;
3516 4865
… …
3526} 4875}
3527#endif 4876#endif
3528 4877
3529#if EV_FORK_ENABLE 4878#if EV_FORK_ENABLE
3530void 4879void
3531ev_fork_start (EV_P_ ev_fork *w) 4880ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3532{ 4881{
3533 if (expect_false (ev_is_active (w))) 4882 if (expect_false (ev_is_active (w)))
3534 return; 4883 return;
3535 4884
3536 EV_FREQUENT_CHECK; 4885 EV_FREQUENT_CHECK;
3537 4886
3538 ev_start (EV_A_ (W)w, ++forkcnt); 4887 ev_start (EV_A_ (W)w, ++forkcnt);
3539 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4888 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3540 forks [forkcnt - 1] = w; 4889 forks [forkcnt - 1] = w;
3541 4890
3542 EV_FREQUENT_CHECK; 4891 EV_FREQUENT_CHECK;
3543} 4892}
3544 4893
3545void 4894void
3546ev_fork_stop (EV_P_ ev_fork *w) 4895ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3547{ 4896{
3548 clear_pending (EV_A_ (W)w); 4897 clear_pending (EV_A_ (W)w);
3549 if (expect_false (!ev_is_active (w))) 4898 if (expect_false (!ev_is_active (w)))
3550 return; 4899 return;
3551 4900
… …
3562 4911
3563 EV_FREQUENT_CHECK; 4912 EV_FREQUENT_CHECK;
3564} 4913}
3565#endif 4914#endif
3566 4915
3567#if EV_ASYNC_ENABLE 4916#if EV_CLEANUP_ENABLE
3568void 4917void
3569ev_async_start (EV_P_ ev_async *w) 4918ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3570{ 4919{
3571 if (expect_false (ev_is_active (w))) 4920 if (expect_false (ev_is_active (w)))
3572 return; 4921 return;
3573 4922
3574 w->sent = 0;
3575
3576 evpipe_init (EV_A);
3577
3578 EV_FREQUENT_CHECK; 4923 EV_FREQUENT_CHECK;
3579 4924
3580 ev_start (EV_A_ (W)w, ++asynccnt); 4925 ev_start (EV_A_ (W)w, ++cleanupcnt);
3581 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4926 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3582 asyncs [asynccnt - 1] = w; 4927 cleanups [cleanupcnt - 1] = w;
3583 4928
4929 /* cleanup watchers should never keep a refcount on the loop */
4930 ev_unref (EV_A);
3584 EV_FREQUENT_CHECK; 4931 EV_FREQUENT_CHECK;
3585} 4932}
3586 4933
3587void 4934void
3588ev_async_stop (EV_P_ ev_async *w) 4935ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3589{ 4936{
3590 clear_pending (EV_A_ (W)w); 4937 clear_pending (EV_A_ (W)w);
3591 if (expect_false (!ev_is_active (w))) 4938 if (expect_false (!ev_is_active (w)))
3592 return; 4939 return;
3593 4940
3594 EV_FREQUENT_CHECK; 4941 EV_FREQUENT_CHECK;
4942 ev_ref (EV_A);
4943
4944 {
4945 int active = ev_active (w);
4946
4947 cleanups [active - 1] = cleanups [--cleanupcnt];
4948 ev_active (cleanups [active - 1]) = active;
4949 }
4950
4951 ev_stop (EV_A_ (W)w);
4952
4953 EV_FREQUENT_CHECK;
4954}
4955#endif
4956
4957#if EV_ASYNC_ENABLE
4958void
4959ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4960{
4961 if (expect_false (ev_is_active (w)))
4962 return;
4963
4964 w->sent = 0;
4965
4966 evpipe_init (EV_A);
4967
4968 EV_FREQUENT_CHECK;
4969
4970 ev_start (EV_A_ (W)w, ++asynccnt);
4971 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4972 asyncs [asynccnt - 1] = w;
4973
4974 EV_FREQUENT_CHECK;
4975}
4976
4977void
4978ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4979{
4980 clear_pending (EV_A_ (W)w);
4981 if (expect_false (!ev_is_active (w)))
4982 return;
4983
4984 EV_FREQUENT_CHECK;
3595 4985
3596 { 4986 {
3597 int active = ev_active (w); 4987 int active = ev_active (w);
3598 4988
3599 asyncs [active - 1] = asyncs [--asynccnt]; 4989 asyncs [active - 1] = asyncs [--asynccnt];
… …
3604 4994
3605 EV_FREQUENT_CHECK; 4995 EV_FREQUENT_CHECK;
3606} 4996}
3607 4997
3608void 4998void
3609ev_async_send (EV_P_ ev_async *w) 4999ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3610{ 5000{
3611 w->sent = 1; 5001 w->sent = 1;
3612 evpipe_write (EV_A_ &async_pending); 5002 evpipe_write (EV_A_ &async_pending);
3613} 5003}
3614#endif 5004#endif
… …
3651 5041
3652 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5042 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3653} 5043}
3654 5044
3655void 5045void
3656ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5046ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3657{ 5047{
3658 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5048 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3659
3660 if (expect_false (!once))
3661 {
3662 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3663 return;
3664 }
3665 5049
3666 once->cb = cb; 5050 once->cb = cb;
3667 once->arg = arg; 5051 once->arg = arg;
3668 5052
3669 ev_init (&once->io, once_cb_io); 5053 ev_init (&once->io, once_cb_io);
… …
3682} 5066}
3683 5067
3684/*****************************************************************************/ 5068/*****************************************************************************/
3685 5069
3686#if EV_WALK_ENABLE 5070#if EV_WALK_ENABLE
5071ecb_cold
3687void 5072void
3688ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5073ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3689{ 5074{
3690 int i, j; 5075 int i, j;
3691 ev_watcher_list *wl, *wn; 5076 ev_watcher_list *wl, *wn;
3692 5077
3693 if (types & (EV_IO | EV_EMBED)) 5078 if (types & (EV_IO | EV_EMBED))
… …
3736 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5121 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3737#endif 5122#endif
3738 5123
3739#if EV_IDLE_ENABLE 5124#if EV_IDLE_ENABLE
3740 if (types & EV_IDLE) 5125 if (types & EV_IDLE)
3741 for (j = NUMPRI; i--; ) 5126 for (j = NUMPRI; j--; )
3742 for (i = idlecnt [j]; i--; ) 5127 for (i = idlecnt [j]; i--; )
3743 cb (EV_A_ EV_IDLE, idles [j][i]); 5128 cb (EV_A_ EV_IDLE, idles [j][i]);
3744#endif 5129#endif
3745 5130
3746#if EV_FORK_ENABLE 5131#if EV_FORK_ENABLE
… …
3799 5184
3800#if EV_MULTIPLICITY 5185#if EV_MULTIPLICITY
3801 #include "ev_wrap.h" 5186 #include "ev_wrap.h"
3802#endif 5187#endif
3803 5188
3804EV_CPP(})
3805

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