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Comparing libev/ev.c (file contents):
Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC vs.
Revision 1.496 by root, Mon Jun 24 22:27:29 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif 114# endif
109# else 115# else
110# undef EV_USE_EPOLL 116# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
112# endif 127# endif
113 128
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE 130# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
… …
156# define EV_USE_EVENTFD 0 171# define EV_USE_EVENTFD 0
157# endif 172# endif
158 173
159#endif 174#endif
160 175
161#include <math.h> 176/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184#define _DARWIN_UNLIMITED_SELECT 1
185
162#include <stdlib.h> 186#include <stdlib.h>
163#include <string.h> 187#include <string.h>
164#include <fcntl.h> 188#include <fcntl.h>
165#include <stddef.h> 189#include <stddef.h>
166 190
… …
178# include EV_H 202# include EV_H
179#else 203#else
180# include "ev.h" 204# include "ev.h"
181#endif 205#endif
182 206
183EV_CPP(extern "C" {) 207#if EV_NO_THREADS
208# undef EV_NO_SMP
209# define EV_NO_SMP 1
210# undef ECB_NO_THREADS
211# define ECB_NO_THREADS 1
212#endif
213#if EV_NO_SMP
214# undef EV_NO_SMP
215# define ECB_NO_SMP 1
216#endif
184 217
185#ifndef _WIN32 218#ifndef _WIN32
186# include <sys/time.h> 219# include <sys/time.h>
187# include <sys/wait.h> 220# include <sys/wait.h>
188# include <unistd.h> 221# include <unistd.h>
189#else 222#else
190# include <io.h> 223# include <io.h>
191# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
192# include <windows.h> 226# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
195# endif 229# endif
196# undef EV_AVOID_STDIO 230# undef EV_AVOID_STDIO
197#endif 231#endif
198 232
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 233/* this block tries to deduce configuration from header-defined symbols and defaults */
208 234
209/* try to deduce the maximum number of signals on this platform */ 235/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 236#if defined EV_NSIG
211/* use what's provided */ 237/* use what's provided */
212#elif defined (NSIG) 238#elif defined NSIG
213# define EV_NSIG (NSIG) 239# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 240#elif defined _NSIG
215# define EV_NSIG (_NSIG) 241# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 242#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 243# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 244#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 245# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 246#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 247# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 248#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 249# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 250#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 251# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 252#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 253# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 254#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 255# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 256#else
231# error "unable to find value for NSIG, please report" 257# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 258#endif
233/* but consider reporting it, too! :) */ 259
234# define EV_NSIG 65 260#ifndef EV_USE_FLOOR
261# define EV_USE_FLOOR 0
235#endif 262#endif
236 263
237#ifndef EV_USE_CLOCK_SYSCALL 264#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 265# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 266# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 267# else
241# define EV_USE_CLOCK_SYSCALL 0 268# define EV_USE_CLOCK_SYSCALL 0
242# endif 269# endif
243#endif 270#endif
244 271
272#if !(_POSIX_TIMERS > 0)
273# ifndef EV_USE_MONOTONIC
274# define EV_USE_MONOTONIC 0
275# endif
276# ifndef EV_USE_REALTIME
277# define EV_USE_REALTIME 0
278# endif
279#endif
280
245#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 283# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 284# else
249# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
250# endif 286# endif
251#endif 287#endif
… …
288 324
289#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
290# define EV_USE_PORT 0 326# define EV_USE_PORT 0
291#endif 327#endif
292 328
329#ifndef EV_USE_LINUXAIO
330# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
331# define EV_USE_LINUXAIO 1
332# else
333# define EV_USE_LINUXAIO 0
334# endif
335#endif
336
293#ifndef EV_USE_INOTIFY 337#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 338# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS 339# define EV_USE_INOTIFY EV_FEATURE_OS
296# else 340# else
297# define EV_USE_INOTIFY 0 341# define EV_USE_INOTIFY 0
… …
338 382
339#ifndef EV_HEAP_CACHE_AT 383#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 384# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 385#endif
342 386
387#ifdef __ANDROID__
388/* supposedly, android doesn't typedef fd_mask */
389# undef EV_USE_SELECT
390# define EV_USE_SELECT 0
391/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
392# undef EV_USE_CLOCK_SYSCALL
393# define EV_USE_CLOCK_SYSCALL 0
394#endif
395
396/* aix's poll.h seems to cause lots of trouble */
397#ifdef _AIX
398/* AIX has a completely broken poll.h header */
399# undef EV_USE_POLL
400# define EV_USE_POLL 0
401#endif
402
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 403/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 404/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 405#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 406# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 407# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 408# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 409# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 410# define EV_USE_MONOTONIC 1
351# else 411# else
… …
354# endif 414# endif
355#endif 415#endif
356 416
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 417/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 418
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 419#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 420# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 421# define EV_USE_MONOTONIC 0
368#endif 422#endif
369 423
… …
376# undef EV_USE_INOTIFY 430# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 431# define EV_USE_INOTIFY 0
378#endif 432#endif
379 433
380#if !EV_USE_NANOSLEEP 434#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 435/* hp-ux has it in sys/time.h, which we unconditionally include above */
436# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 437# include <sys/select.h>
438# endif
439#endif
440
441#if EV_USE_LINUXAIO
442# include <sys/syscall.h>
443# if !SYS_io_getevents || !EV_USE_EPOLL /* ev_linxaio uses ev_poll.c:ev_epoll_create */
444# undef EV_USE_LINUXAIO
445# define EV_USE_LINUXAIO 0
383# endif 446# endif
384#endif 447#endif
385 448
386#if EV_USE_INOTIFY 449#if EV_USE_INOTIFY
387# include <sys/statfs.h> 450# include <sys/statfs.h>
… …
389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 452/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
390# ifndef IN_DONT_FOLLOW 453# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY 454# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0 455# define EV_USE_INOTIFY 0
393# endif 456# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif 457#endif
399 458
400#if EV_USE_EVENTFD 459#if EV_USE_EVENTFD
401/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 460/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
402# include <stdint.h> 461# include <stdint.h>
… …
442#else 501#else
443# define EV_FREQUENT_CHECK do { } while (0) 502# define EV_FREQUENT_CHECK do { } while (0)
444#endif 503#endif
445 504
446/* 505/*
447 * This is used to avoid floating point rounding problems. 506 * This is used to work around floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000. 507 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 508 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 509#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
510/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
455 511
456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 512#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 513#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
458 514
459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 515#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
460#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 516#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
461 517
518/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
519/* ECB.H BEGIN */
520/*
521 * libecb - http://software.schmorp.de/pkg/libecb
522 *
523 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
524 * Copyright (©) 2011 Emanuele Giaquinta
525 * All rights reserved.
526 *
527 * Redistribution and use in source and binary forms, with or without modifica-
528 * tion, are permitted provided that the following conditions are met:
529 *
530 * 1. Redistributions of source code must retain the above copyright notice,
531 * this list of conditions and the following disclaimer.
532 *
533 * 2. Redistributions in binary form must reproduce the above copyright
534 * notice, this list of conditions and the following disclaimer in the
535 * documentation and/or other materials provided with the distribution.
536 *
537 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
538 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
539 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
540 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
541 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
542 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
543 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
544 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
545 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
546 * OF THE POSSIBILITY OF SUCH DAMAGE.
547 *
548 * Alternatively, the contents of this file may be used under the terms of
549 * the GNU General Public License ("GPL") version 2 or any later version,
550 * in which case the provisions of the GPL are applicable instead of
551 * the above. If you wish to allow the use of your version of this file
552 * only under the terms of the GPL and not to allow others to use your
553 * version of this file under the BSD license, indicate your decision
554 * by deleting the provisions above and replace them with the notice
555 * and other provisions required by the GPL. If you do not delete the
556 * provisions above, a recipient may use your version of this file under
557 * either the BSD or the GPL.
558 */
559
560#ifndef ECB_H
561#define ECB_H
562
563/* 16 bits major, 16 bits minor */
564#define ECB_VERSION 0x00010006
565
566#ifdef _WIN32
567 typedef signed char int8_t;
568 typedef unsigned char uint8_t;
569 typedef signed short int16_t;
570 typedef unsigned short uint16_t;
571 typedef signed int int32_t;
572 typedef unsigned int uint32_t;
462#if __GNUC__ >= 4 573 #if __GNUC__
574 typedef signed long long int64_t;
575 typedef unsigned long long uint64_t;
576 #else /* _MSC_VER || __BORLANDC__ */
577 typedef signed __int64 int64_t;
578 typedef unsigned __int64 uint64_t;
579 #endif
580 #ifdef _WIN64
581 #define ECB_PTRSIZE 8
582 typedef uint64_t uintptr_t;
583 typedef int64_t intptr_t;
584 #else
585 #define ECB_PTRSIZE 4
586 typedef uint32_t uintptr_t;
587 typedef int32_t intptr_t;
588 #endif
589#else
590 #include <inttypes.h>
591 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
592 #define ECB_PTRSIZE 8
593 #else
594 #define ECB_PTRSIZE 4
595 #endif
596#endif
597
598#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
599#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
600
601/* work around x32 idiocy by defining proper macros */
602#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
603 #if _ILP32
604 #define ECB_AMD64_X32 1
605 #else
606 #define ECB_AMD64 1
607 #endif
608#endif
609
610/* many compilers define _GNUC_ to some versions but then only implement
611 * what their idiot authors think are the "more important" extensions,
612 * causing enormous grief in return for some better fake benchmark numbers.
613 * or so.
614 * we try to detect these and simply assume they are not gcc - if they have
615 * an issue with that they should have done it right in the first place.
616 */
617#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
618 #define ECB_GCC_VERSION(major,minor) 0
619#else
620 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
621#endif
622
623#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
624
625#if __clang__ && defined __has_builtin
626 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
627#else
628 #define ECB_CLANG_BUILTIN(x) 0
629#endif
630
631#if __clang__ && defined __has_extension
632 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
633#else
634 #define ECB_CLANG_EXTENSION(x) 0
635#endif
636
637#define ECB_CPP (__cplusplus+0)
638#define ECB_CPP11 (__cplusplus >= 201103L)
639#define ECB_CPP14 (__cplusplus >= 201402L)
640#define ECB_CPP17 (__cplusplus >= 201703L)
641
642#if ECB_CPP
643 #define ECB_C 0
644 #define ECB_STDC_VERSION 0
645#else
646 #define ECB_C 1
647 #define ECB_STDC_VERSION __STDC_VERSION__
648#endif
649
650#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
651#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
652#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
653
654#if ECB_CPP
655 #define ECB_EXTERN_C extern "C"
656 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
657 #define ECB_EXTERN_C_END }
658#else
659 #define ECB_EXTERN_C extern
660 #define ECB_EXTERN_C_BEG
661 #define ECB_EXTERN_C_END
662#endif
663
664/*****************************************************************************/
665
666/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
667/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
668
669#if ECB_NO_THREADS
670 #define ECB_NO_SMP 1
671#endif
672
673#if ECB_NO_SMP
674 #define ECB_MEMORY_FENCE do { } while (0)
675#endif
676
677/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
678#if __xlC__ && ECB_CPP
679 #include <builtins.h>
680#endif
681
682#if 1400 <= _MSC_VER
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
689 #if __i386 || __i386__
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
691 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
692 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
693 #elif ECB_GCC_AMD64
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
695 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
696 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
697 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
698 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
699 #elif defined __ARM_ARCH_2__ \
700 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
701 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
702 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
703 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
704 || defined __ARM_ARCH_5TEJ__
705 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
706 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
707 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
708 || defined __ARM_ARCH_6T2__
709 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
710 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
711 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
712 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
713 #elif __aarch64__
714 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
715 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
716 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
717 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
718 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
719 #elif defined __s390__ || defined __s390x__
720 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
721 #elif defined __mips__
722 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
723 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
724 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
725 #elif defined __alpha__
726 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
727 #elif defined __hppa__
728 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
729 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
730 #elif defined __ia64__
731 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
732 #elif defined __m68k__
733 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
734 #elif defined __m88k__
735 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
736 #elif defined __sh__
737 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
738 #endif
739 #endif
740#endif
741
742#ifndef ECB_MEMORY_FENCE
743 #if ECB_GCC_VERSION(4,7)
744 /* see comment below (stdatomic.h) about the C11 memory model. */
745 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
746 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
747 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
748 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
749
750 #elif ECB_CLANG_EXTENSION(c_atomic)
751 /* see comment below (stdatomic.h) about the C11 memory model. */
752 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
753 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
754 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
755 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
756
757 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
758 #define ECB_MEMORY_FENCE __sync_synchronize ()
759 #elif _MSC_VER >= 1500 /* VC++ 2008 */
760 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
761 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
762 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
763 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
764 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
765 #elif _MSC_VER >= 1400 /* VC++ 2005 */
766 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
767 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
768 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
769 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
770 #elif defined _WIN32
771 #include <WinNT.h>
772 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
773 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
774 #include <mbarrier.h>
775 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
776 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
777 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
778 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
779 #elif __xlC__
780 #define ECB_MEMORY_FENCE __sync ()
781 #endif
782#endif
783
784#ifndef ECB_MEMORY_FENCE
785 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
786 /* we assume that these memory fences work on all variables/all memory accesses, */
787 /* not just C11 atomics and atomic accesses */
788 #include <stdatomic.h>
789 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
790 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
791 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
792 #endif
793#endif
794
795#ifndef ECB_MEMORY_FENCE
796 #if !ECB_AVOID_PTHREADS
797 /*
798 * if you get undefined symbol references to pthread_mutex_lock,
799 * or failure to find pthread.h, then you should implement
800 * the ECB_MEMORY_FENCE operations for your cpu/compiler
801 * OR provide pthread.h and link against the posix thread library
802 * of your system.
803 */
804 #include <pthread.h>
805 #define ECB_NEEDS_PTHREADS 1
806 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
807
808 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
809 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
810 #endif
811#endif
812
813#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
814 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
815#endif
816
817#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
818 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
819#endif
820
821#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
822 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
823#endif
824
825/*****************************************************************************/
826
827#if ECB_CPP
828 #define ecb_inline static inline
829#elif ECB_GCC_VERSION(2,5)
830 #define ecb_inline static __inline__
831#elif ECB_C99
832 #define ecb_inline static inline
833#else
834 #define ecb_inline static
835#endif
836
837#if ECB_GCC_VERSION(3,3)
838 #define ecb_restrict __restrict__
839#elif ECB_C99
840 #define ecb_restrict restrict
841#else
842 #define ecb_restrict
843#endif
844
845typedef int ecb_bool;
846
847#define ECB_CONCAT_(a, b) a ## b
848#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
849#define ECB_STRINGIFY_(a) # a
850#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
851#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
852
853#define ecb_function_ ecb_inline
854
855#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
856 #define ecb_attribute(attrlist) __attribute__ (attrlist)
857#else
858 #define ecb_attribute(attrlist)
859#endif
860
861#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
862 #define ecb_is_constant(expr) __builtin_constant_p (expr)
863#else
864 /* possible C11 impl for integral types
865 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
866 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
867
868 #define ecb_is_constant(expr) 0
869#endif
870
871#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
463# define expect(expr,value) __builtin_expect ((expr),(value)) 872 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
464# define noinline __attribute__ ((noinline))
465#else 873#else
466# define expect(expr,value) (expr) 874 #define ecb_expect(expr,value) (expr)
467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif 875#endif
471#endif
472 876
877#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
878 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
879#else
880 #define ecb_prefetch(addr,rw,locality)
881#endif
882
883/* no emulation for ecb_decltype */
884#if ECB_CPP11
885 // older implementations might have problems with decltype(x)::type, work around it
886 template<class T> struct ecb_decltype_t { typedef T type; };
887 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
888#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
889 #define ecb_decltype(x) __typeof__ (x)
890#endif
891
892#if _MSC_VER >= 1300
893 #define ecb_deprecated __declspec (deprecated)
894#else
895 #define ecb_deprecated ecb_attribute ((__deprecated__))
896#endif
897
898#if _MSC_VER >= 1500
899 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
900#elif ECB_GCC_VERSION(4,5)
901 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
902#else
903 #define ecb_deprecated_message(msg) ecb_deprecated
904#endif
905
906#if _MSC_VER >= 1400
907 #define ecb_noinline __declspec (noinline)
908#else
909 #define ecb_noinline ecb_attribute ((__noinline__))
910#endif
911
912#define ecb_unused ecb_attribute ((__unused__))
913#define ecb_const ecb_attribute ((__const__))
914#define ecb_pure ecb_attribute ((__pure__))
915
916#if ECB_C11 || __IBMC_NORETURN
917 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
918 #define ecb_noreturn _Noreturn
919#elif ECB_CPP11
920 #define ecb_noreturn [[noreturn]]
921#elif _MSC_VER >= 1200
922 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
923 #define ecb_noreturn __declspec (noreturn)
924#else
925 #define ecb_noreturn ecb_attribute ((__noreturn__))
926#endif
927
928#if ECB_GCC_VERSION(4,3)
929 #define ecb_artificial ecb_attribute ((__artificial__))
930 #define ecb_hot ecb_attribute ((__hot__))
931 #define ecb_cold ecb_attribute ((__cold__))
932#else
933 #define ecb_artificial
934 #define ecb_hot
935 #define ecb_cold
936#endif
937
938/* put around conditional expressions if you are very sure that the */
939/* expression is mostly true or mostly false. note that these return */
940/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 941#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 942#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
943/* for compatibility to the rest of the world */
944#define ecb_likely(expr) ecb_expect_true (expr)
945#define ecb_unlikely(expr) ecb_expect_false (expr)
946
947/* count trailing zero bits and count # of one bits */
948#if ECB_GCC_VERSION(3,4) \
949 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
950 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
951 && ECB_CLANG_BUILTIN(__builtin_popcount))
952 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
953 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
954 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
955 #define ecb_ctz32(x) __builtin_ctz (x)
956 #define ecb_ctz64(x) __builtin_ctzll (x)
957 #define ecb_popcount32(x) __builtin_popcount (x)
958 /* no popcountll */
959#else
960 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
961 ecb_function_ ecb_const int
962 ecb_ctz32 (uint32_t x)
963 {
964#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
965 unsigned long r;
966 _BitScanForward (&r, x);
967 return (int)r;
968#else
969 int r = 0;
970
971 x &= ~x + 1; /* this isolates the lowest bit */
972
973#if ECB_branchless_on_i386
974 r += !!(x & 0xaaaaaaaa) << 0;
975 r += !!(x & 0xcccccccc) << 1;
976 r += !!(x & 0xf0f0f0f0) << 2;
977 r += !!(x & 0xff00ff00) << 3;
978 r += !!(x & 0xffff0000) << 4;
979#else
980 if (x & 0xaaaaaaaa) r += 1;
981 if (x & 0xcccccccc) r += 2;
982 if (x & 0xf0f0f0f0) r += 4;
983 if (x & 0xff00ff00) r += 8;
984 if (x & 0xffff0000) r += 16;
985#endif
986
987 return r;
988#endif
989 }
990
991 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
992 ecb_function_ ecb_const int
993 ecb_ctz64 (uint64_t x)
994 {
995#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
996 unsigned long r;
997 _BitScanForward64 (&r, x);
998 return (int)r;
999#else
1000 int shift = x & 0xffffffff ? 0 : 32;
1001 return ecb_ctz32 (x >> shift) + shift;
1002#endif
1003 }
1004
1005 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1006 ecb_function_ ecb_const int
1007 ecb_popcount32 (uint32_t x)
1008 {
1009 x -= (x >> 1) & 0x55555555;
1010 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1011 x = ((x >> 4) + x) & 0x0f0f0f0f;
1012 x *= 0x01010101;
1013
1014 return x >> 24;
1015 }
1016
1017 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1018 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1019 {
1020#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1021 unsigned long r;
1022 _BitScanReverse (&r, x);
1023 return (int)r;
1024#else
1025 int r = 0;
1026
1027 if (x >> 16) { x >>= 16; r += 16; }
1028 if (x >> 8) { x >>= 8; r += 8; }
1029 if (x >> 4) { x >>= 4; r += 4; }
1030 if (x >> 2) { x >>= 2; r += 2; }
1031 if (x >> 1) { r += 1; }
1032
1033 return r;
1034#endif
1035 }
1036
1037 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1038 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1039 {
1040#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1041 unsigned long r;
1042 _BitScanReverse64 (&r, x);
1043 return (int)r;
1044#else
1045 int r = 0;
1046
1047 if (x >> 32) { x >>= 32; r += 32; }
1048
1049 return r + ecb_ld32 (x);
1050#endif
1051 }
1052#endif
1053
1054ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1055ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1056ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1057ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1058
1059ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1060ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1061{
1062 return ( (x * 0x0802U & 0x22110U)
1063 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1064}
1065
1066ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1067ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1068{
1069 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1070 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1071 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1072 x = ( x >> 8 ) | ( x << 8);
1073
1074 return x;
1075}
1076
1077ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1078ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1079{
1080 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1081 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1082 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1083 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1084 x = ( x >> 16 ) | ( x << 16);
1085
1086 return x;
1087}
1088
1089/* popcount64 is only available on 64 bit cpus as gcc builtin */
1090/* so for this version we are lazy */
1091ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1092ecb_function_ ecb_const int
1093ecb_popcount64 (uint64_t x)
1094{
1095 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1096}
1097
1098ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1099ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1100ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1101ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1102ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1103ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1104ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1105ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1106
1107ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1108ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1109ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1110ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1111ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1112ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1113ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1114ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1115
1116#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1117 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1118 #define ecb_bswap16(x) __builtin_bswap16 (x)
1119 #else
1120 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1121 #endif
1122 #define ecb_bswap32(x) __builtin_bswap32 (x)
1123 #define ecb_bswap64(x) __builtin_bswap64 (x)
1124#elif _MSC_VER
1125 #include <stdlib.h>
1126 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1127 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1128 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1129#else
1130 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1131 ecb_function_ ecb_const uint16_t
1132 ecb_bswap16 (uint16_t x)
1133 {
1134 return ecb_rotl16 (x, 8);
1135 }
1136
1137 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1138 ecb_function_ ecb_const uint32_t
1139 ecb_bswap32 (uint32_t x)
1140 {
1141 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1142 }
1143
1144 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1145 ecb_function_ ecb_const uint64_t
1146 ecb_bswap64 (uint64_t x)
1147 {
1148 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1149 }
1150#endif
1151
1152#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1153 #define ecb_unreachable() __builtin_unreachable ()
1154#else
1155 /* this seems to work fine, but gcc always emits a warning for it :/ */
1156 ecb_inline ecb_noreturn void ecb_unreachable (void);
1157 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1158#endif
1159
1160/* try to tell the compiler that some condition is definitely true */
1161#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1162
1163ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1164ecb_inline ecb_const uint32_t
1165ecb_byteorder_helper (void)
1166{
1167 /* the union code still generates code under pressure in gcc, */
1168 /* but less than using pointers, and always seems to */
1169 /* successfully return a constant. */
1170 /* the reason why we have this horrible preprocessor mess */
1171 /* is to avoid it in all cases, at least on common architectures */
1172 /* or when using a recent enough gcc version (>= 4.6) */
1173#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1174 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1175 #define ECB_LITTLE_ENDIAN 1
1176 return 0x44332211;
1177#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1178 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1179 #define ECB_BIG_ENDIAN 1
1180 return 0x11223344;
1181#else
1182 union
1183 {
1184 uint8_t c[4];
1185 uint32_t u;
1186 } u = { 0x11, 0x22, 0x33, 0x44 };
1187 return u.u;
1188#endif
1189}
1190
1191ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1192ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1193ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1194ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1195
1196#if ECB_GCC_VERSION(3,0) || ECB_C99
1197 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1198#else
1199 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1200#endif
1201
1202#if ECB_CPP
1203 template<typename T>
1204 static inline T ecb_div_rd (T val, T div)
1205 {
1206 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1207 }
1208 template<typename T>
1209 static inline T ecb_div_ru (T val, T div)
1210 {
1211 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1212 }
1213#else
1214 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1215 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1216#endif
1217
1218#if ecb_cplusplus_does_not_suck
1219 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1220 template<typename T, int N>
1221 static inline int ecb_array_length (const T (&arr)[N])
1222 {
1223 return N;
1224 }
1225#else
1226 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1227#endif
1228
1229ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1230ecb_function_ ecb_const uint32_t
1231ecb_binary16_to_binary32 (uint32_t x)
1232{
1233 unsigned int s = (x & 0x8000) << (31 - 15);
1234 int e = (x >> 10) & 0x001f;
1235 unsigned int m = x & 0x03ff;
1236
1237 if (ecb_expect_false (e == 31))
1238 /* infinity or NaN */
1239 e = 255 - (127 - 15);
1240 else if (ecb_expect_false (!e))
1241 {
1242 if (ecb_expect_true (!m))
1243 /* zero, handled by code below by forcing e to 0 */
1244 e = 0 - (127 - 15);
1245 else
1246 {
1247 /* subnormal, renormalise */
1248 unsigned int s = 10 - ecb_ld32 (m);
1249
1250 m = (m << s) & 0x3ff; /* mask implicit bit */
1251 e -= s - 1;
1252 }
1253 }
1254
1255 /* e and m now are normalised, or zero, (or inf or nan) */
1256 e += 127 - 15;
1257
1258 return s | (e << 23) | (m << (23 - 10));
1259}
1260
1261ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1262ecb_function_ ecb_const uint16_t
1263ecb_binary32_to_binary16 (uint32_t x)
1264{
1265 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1266 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1267 unsigned int m = x & 0x007fffff;
1268
1269 x &= 0x7fffffff;
1270
1271 /* if it's within range of binary16 normals, use fast path */
1272 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1273 {
1274 /* mantissa round-to-even */
1275 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1276
1277 /* handle overflow */
1278 if (ecb_expect_false (m >= 0x00800000))
1279 {
1280 m >>= 1;
1281 e += 1;
1282 }
1283
1284 return s | (e << 10) | (m >> (23 - 10));
1285 }
1286
1287 /* handle large numbers and infinity */
1288 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1289 return s | 0x7c00;
1290
1291 /* handle zero, subnormals and small numbers */
1292 if (ecb_expect_true (x < 0x38800000))
1293 {
1294 /* zero */
1295 if (ecb_expect_true (!x))
1296 return s;
1297
1298 /* handle subnormals */
1299
1300 /* too small, will be zero */
1301 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1302 return s;
1303
1304 m |= 0x00800000; /* make implicit bit explicit */
1305
1306 /* very tricky - we need to round to the nearest e (+10) bit value */
1307 {
1308 unsigned int bits = 14 - e;
1309 unsigned int half = (1 << (bits - 1)) - 1;
1310 unsigned int even = (m >> bits) & 1;
1311
1312 /* if this overflows, we will end up with a normalised number */
1313 m = (m + half + even) >> bits;
1314 }
1315
1316 return s | m;
1317 }
1318
1319 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1320 m >>= 13;
1321
1322 return s | 0x7c00 | m | !m;
1323}
1324
1325/*******************************************************************************/
1326/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1327
1328/* basically, everything uses "ieee pure-endian" floating point numbers */
1329/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1330#if 0 \
1331 || __i386 || __i386__ \
1332 || ECB_GCC_AMD64 \
1333 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1334 || defined __s390__ || defined __s390x__ \
1335 || defined __mips__ \
1336 || defined __alpha__ \
1337 || defined __hppa__ \
1338 || defined __ia64__ \
1339 || defined __m68k__ \
1340 || defined __m88k__ \
1341 || defined __sh__ \
1342 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1343 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1344 || defined __aarch64__
1345 #define ECB_STDFP 1
1346 #include <string.h> /* for memcpy */
1347#else
1348 #define ECB_STDFP 0
1349#endif
1350
1351#ifndef ECB_NO_LIBM
1352
1353 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1354
1355 /* only the oldest of old doesn't have this one. solaris. */
1356 #ifdef INFINITY
1357 #define ECB_INFINITY INFINITY
1358 #else
1359 #define ECB_INFINITY HUGE_VAL
1360 #endif
1361
1362 #ifdef NAN
1363 #define ECB_NAN NAN
1364 #else
1365 #define ECB_NAN ECB_INFINITY
1366 #endif
1367
1368 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1369 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1370 #define ecb_frexpf(x,e) frexpf ((x), (e))
1371 #else
1372 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1373 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1374 #endif
1375
1376 /* convert a float to ieee single/binary32 */
1377 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1378 ecb_function_ ecb_const uint32_t
1379 ecb_float_to_binary32 (float x)
1380 {
1381 uint32_t r;
1382
1383 #if ECB_STDFP
1384 memcpy (&r, &x, 4);
1385 #else
1386 /* slow emulation, works for anything but -0 */
1387 uint32_t m;
1388 int e;
1389
1390 if (x == 0e0f ) return 0x00000000U;
1391 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1392 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1393 if (x != x ) return 0x7fbfffffU;
1394
1395 m = ecb_frexpf (x, &e) * 0x1000000U;
1396
1397 r = m & 0x80000000U;
1398
1399 if (r)
1400 m = -m;
1401
1402 if (e <= -126)
1403 {
1404 m &= 0xffffffU;
1405 m >>= (-125 - e);
1406 e = -126;
1407 }
1408
1409 r |= (e + 126) << 23;
1410 r |= m & 0x7fffffU;
1411 #endif
1412
1413 return r;
1414 }
1415
1416 /* converts an ieee single/binary32 to a float */
1417 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1418 ecb_function_ ecb_const float
1419 ecb_binary32_to_float (uint32_t x)
1420 {
1421 float r;
1422
1423 #if ECB_STDFP
1424 memcpy (&r, &x, 4);
1425 #else
1426 /* emulation, only works for normals and subnormals and +0 */
1427 int neg = x >> 31;
1428 int e = (x >> 23) & 0xffU;
1429
1430 x &= 0x7fffffU;
1431
1432 if (e)
1433 x |= 0x800000U;
1434 else
1435 e = 1;
1436
1437 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1438 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1439
1440 r = neg ? -r : r;
1441 #endif
1442
1443 return r;
1444 }
1445
1446 /* convert a double to ieee double/binary64 */
1447 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1448 ecb_function_ ecb_const uint64_t
1449 ecb_double_to_binary64 (double x)
1450 {
1451 uint64_t r;
1452
1453 #if ECB_STDFP
1454 memcpy (&r, &x, 8);
1455 #else
1456 /* slow emulation, works for anything but -0 */
1457 uint64_t m;
1458 int e;
1459
1460 if (x == 0e0 ) return 0x0000000000000000U;
1461 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1462 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1463 if (x != x ) return 0X7ff7ffffffffffffU;
1464
1465 m = frexp (x, &e) * 0x20000000000000U;
1466
1467 r = m & 0x8000000000000000;;
1468
1469 if (r)
1470 m = -m;
1471
1472 if (e <= -1022)
1473 {
1474 m &= 0x1fffffffffffffU;
1475 m >>= (-1021 - e);
1476 e = -1022;
1477 }
1478
1479 r |= ((uint64_t)(e + 1022)) << 52;
1480 r |= m & 0xfffffffffffffU;
1481 #endif
1482
1483 return r;
1484 }
1485
1486 /* converts an ieee double/binary64 to a double */
1487 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1488 ecb_function_ ecb_const double
1489 ecb_binary64_to_double (uint64_t x)
1490 {
1491 double r;
1492
1493 #if ECB_STDFP
1494 memcpy (&r, &x, 8);
1495 #else
1496 /* emulation, only works for normals and subnormals and +0 */
1497 int neg = x >> 63;
1498 int e = (x >> 52) & 0x7ffU;
1499
1500 x &= 0xfffffffffffffU;
1501
1502 if (e)
1503 x |= 0x10000000000000U;
1504 else
1505 e = 1;
1506
1507 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1508 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1509
1510 r = neg ? -r : r;
1511 #endif
1512
1513 return r;
1514 }
1515
1516 /* convert a float to ieee half/binary16 */
1517 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1518 ecb_function_ ecb_const uint16_t
1519 ecb_float_to_binary16 (float x)
1520 {
1521 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1522 }
1523
1524 /* convert an ieee half/binary16 to float */
1525 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1526 ecb_function_ ecb_const float
1527 ecb_binary16_to_float (uint16_t x)
1528 {
1529 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1530 }
1531
1532#endif
1533
1534#endif
1535
1536/* ECB.H END */
1537
1538#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1539/* if your architecture doesn't need memory fences, e.g. because it is
1540 * single-cpu/core, or if you use libev in a project that doesn't use libev
1541 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1542 * libev, in which cases the memory fences become nops.
1543 * alternatively, you can remove this #error and link against libpthread,
1544 * which will then provide the memory fences.
1545 */
1546# error "memory fences not defined for your architecture, please report"
1547#endif
1548
1549#ifndef ECB_MEMORY_FENCE
1550# define ECB_MEMORY_FENCE do { } while (0)
1551# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1552# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1553#endif
1554
1555#define expect_false(cond) ecb_expect_false (cond)
1556#define expect_true(cond) ecb_expect_true (cond)
1557#define noinline ecb_noinline
1558
475#define inline_size static inline 1559#define inline_size ecb_inline
476 1560
477#if EV_FEATURE_CODE 1561#if EV_FEATURE_CODE
478# define inline_speed static inline 1562# define inline_speed ecb_inline
479#else 1563#else
480# define inline_speed static noinline 1564# define inline_speed noinline static
481#endif 1565#endif
482 1566
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1567#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484 1568
485#if EV_MINPRI == EV_MAXPRI 1569#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0) 1570# define ABSPRI(w) (((W)w), 0)
487#else 1571#else
488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1572# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif 1573#endif
490 1574
491#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1575#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493 1576
494typedef ev_watcher *W; 1577typedef ev_watcher *W;
495typedef ev_watcher_list *WL; 1578typedef ev_watcher_list *WL;
496typedef ev_watcher_time *WT; 1579typedef ev_watcher_time *WT;
497 1580
… …
522# include "ev_win32.c" 1605# include "ev_win32.c"
523#endif 1606#endif
524 1607
525/*****************************************************************************/ 1608/*****************************************************************************/
526 1609
1610#if EV_USE_LINUXAIO
1611# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1612#endif
1613
1614/* define a suitable floor function (only used by periodics atm) */
1615
1616#if EV_USE_FLOOR
1617# include <math.h>
1618# define ev_floor(v) floor (v)
1619#else
1620
1621#include <float.h>
1622
1623/* a floor() replacement function, should be independent of ev_tstamp type */
1624noinline
1625static ev_tstamp
1626ev_floor (ev_tstamp v)
1627{
1628 /* the choice of shift factor is not terribly important */
1629#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1630 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1631#else
1632 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1633#endif
1634
1635 /* argument too large for an unsigned long? */
1636 if (expect_false (v >= shift))
1637 {
1638 ev_tstamp f;
1639
1640 if (v == v - 1.)
1641 return v; /* very large number */
1642
1643 f = shift * ev_floor (v * (1. / shift));
1644 return f + ev_floor (v - f);
1645 }
1646
1647 /* special treatment for negative args? */
1648 if (expect_false (v < 0.))
1649 {
1650 ev_tstamp f = -ev_floor (-v);
1651
1652 return f - (f == v ? 0 : 1);
1653 }
1654
1655 /* fits into an unsigned long */
1656 return (unsigned long)v;
1657}
1658
1659#endif
1660
1661/*****************************************************************************/
1662
527#ifdef __linux 1663#ifdef __linux
528# include <sys/utsname.h> 1664# include <sys/utsname.h>
529#endif 1665#endif
530 1666
1667noinline ecb_cold
531static unsigned int noinline 1668static unsigned int
532ev_linux_version (void) 1669ev_linux_version (void)
533{ 1670{
534#ifdef __linux 1671#ifdef __linux
1672 unsigned int v = 0;
535 struct utsname buf; 1673 struct utsname buf;
536 unsigned int v;
537 int i; 1674 int i;
538 char *p = buf.release; 1675 char *p = buf.release;
539 1676
540 if (uname (&buf)) 1677 if (uname (&buf))
541 return 0; 1678 return 0;
… …
565} 1702}
566 1703
567/*****************************************************************************/ 1704/*****************************************************************************/
568 1705
569#if EV_AVOID_STDIO 1706#if EV_AVOID_STDIO
570static void noinline 1707noinline ecb_cold
1708static void
571ev_printerr (const char *msg) 1709ev_printerr (const char *msg)
572{ 1710{
573 write (STDERR_FILENO, msg, strlen (msg)); 1711 write (STDERR_FILENO, msg, strlen (msg));
574} 1712}
575#endif 1713#endif
576 1714
577static void (*syserr_cb)(const char *msg); 1715static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
578 1716
1717ecb_cold
579void 1718void
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1719ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
581{ 1720{
582 syserr_cb = cb; 1721 syserr_cb = cb;
583} 1722}
584 1723
585static void noinline 1724noinline ecb_cold
1725static void
586ev_syserr (const char *msg) 1726ev_syserr (const char *msg)
587{ 1727{
588 if (!msg) 1728 if (!msg)
589 msg = "(libev) system error"; 1729 msg = "(libev) system error";
590 1730
591 if (syserr_cb) 1731 if (syserr_cb)
592 syserr_cb (msg); 1732 syserr_cb (msg);
593 else 1733 else
594 { 1734 {
595#if EV_AVOID_STDIO 1735#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg); 1736 ev_printerr (msg);
599 ev_printerr (": "); 1737 ev_printerr (": ");
600 ev_printerr (err); 1738 ev_printerr (strerror (errno));
601 ev_printerr ("\n"); 1739 ev_printerr ("\n");
602#else 1740#else
603 perror (msg); 1741 perror (msg);
604#endif 1742#endif
605 abort (); 1743 abort ();
606 } 1744 }
607} 1745}
608 1746
609static void * 1747static void *
610ev_realloc_emul (void *ptr, long size) 1748ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
611{ 1749{
612#if __GLIBC__
613 return realloc (ptr, size);
614#else
615 /* some systems, notably openbsd and darwin, fail to properly 1750 /* some systems, notably openbsd and darwin, fail to properly
616 * implement realloc (x, 0) (as required by both ansi c-89 and 1751 * implement realloc (x, 0) (as required by both ansi c-89 and
617 * the single unix specification, so work around them here. 1752 * the single unix specification, so work around them here.
1753 * recently, also (at least) fedora and debian started breaking it,
1754 * despite documenting it otherwise.
618 */ 1755 */
619 1756
620 if (size) 1757 if (size)
621 return realloc (ptr, size); 1758 return realloc (ptr, size);
622 1759
623 free (ptr); 1760 free (ptr);
624 return 0; 1761 return 0;
625#endif
626} 1762}
627 1763
628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1764static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
629 1765
1766ecb_cold
630void 1767void
631ev_set_allocator (void *(*cb)(void *ptr, long size)) 1768ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
632{ 1769{
633 alloc = cb; 1770 alloc = cb;
634} 1771}
635 1772
636inline_speed void * 1773inline_speed void *
… …
639 ptr = alloc (ptr, size); 1776 ptr = alloc (ptr, size);
640 1777
641 if (!ptr && size) 1778 if (!ptr && size)
642 { 1779 {
643#if EV_AVOID_STDIO 1780#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1781 ev_printerr ("(libev) memory allocation failed, aborting.\n");
645#else 1782#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1783 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647#endif 1784#endif
648 abort (); 1785 abort ();
649 } 1786 }
650 1787
651 return ptr; 1788 return ptr;
… …
663typedef struct 1800typedef struct
664{ 1801{
665 WL head; 1802 WL head;
666 unsigned char events; /* the events watched for */ 1803 unsigned char events; /* the events watched for */
667 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1804 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
668 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1805 unsigned char emask; /* some backends store the actual kernel mask in here */
669 unsigned char unused; 1806 unsigned char unused;
670#if EV_USE_EPOLL 1807#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */ 1808 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif 1809#endif
673#if EV_SELECT_IS_WINSOCKET 1810#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
674 SOCKET handle; 1811 SOCKET handle;
1812#endif
1813#if EV_USE_IOCP
1814 OVERLAPPED or, ow;
675#endif 1815#endif
676} ANFD; 1816} ANFD;
677 1817
678/* stores the pending event set for a given watcher */ 1818/* stores the pending event set for a given watcher */
679typedef struct 1819typedef struct
… …
721 #undef VAR 1861 #undef VAR
722 }; 1862 };
723 #include "ev_wrap.h" 1863 #include "ev_wrap.h"
724 1864
725 static struct ev_loop default_loop_struct; 1865 static struct ev_loop default_loop_struct;
726 struct ev_loop *ev_default_loop_ptr; 1866 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
727 1867
728#else 1868#else
729 1869
730 ev_tstamp ev_rt_now; 1870 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
731 #define VAR(name,decl) static decl; 1871 #define VAR(name,decl) static decl;
732 #include "ev_vars.h" 1872 #include "ev_vars.h"
733 #undef VAR 1873 #undef VAR
734 1874
735 static int ev_default_loop_ptr; 1875 static int ev_default_loop_ptr;
… …
750 1890
751/*****************************************************************************/ 1891/*****************************************************************************/
752 1892
753#ifndef EV_HAVE_EV_TIME 1893#ifndef EV_HAVE_EV_TIME
754ev_tstamp 1894ev_tstamp
755ev_time (void) 1895ev_time (void) EV_NOEXCEPT
756{ 1896{
757#if EV_USE_REALTIME 1897#if EV_USE_REALTIME
758 if (expect_true (have_realtime)) 1898 if (expect_true (have_realtime))
759 { 1899 {
760 struct timespec ts; 1900 struct timespec ts;
… …
784 return ev_time (); 1924 return ev_time ();
785} 1925}
786 1926
787#if EV_MULTIPLICITY 1927#if EV_MULTIPLICITY
788ev_tstamp 1928ev_tstamp
789ev_now (EV_P) 1929ev_now (EV_P) EV_NOEXCEPT
790{ 1930{
791 return ev_rt_now; 1931 return ev_rt_now;
792} 1932}
793#endif 1933#endif
794 1934
795void 1935void
796ev_sleep (ev_tstamp delay) 1936ev_sleep (ev_tstamp delay) EV_NOEXCEPT
797{ 1937{
798 if (delay > 0.) 1938 if (delay > 0.)
799 { 1939 {
800#if EV_USE_NANOSLEEP 1940#if EV_USE_NANOSLEEP
801 struct timespec ts; 1941 struct timespec ts;
802 1942
803 EV_TS_SET (ts, delay); 1943 EV_TS_SET (ts, delay);
804 nanosleep (&ts, 0); 1944 nanosleep (&ts, 0);
805#elif defined(_WIN32) 1945#elif defined _WIN32
1946 /* maybe this should round up, as ms is very low resolution */
1947 /* compared to select (µs) or nanosleep (ns) */
806 Sleep ((unsigned long)(delay * 1e3)); 1948 Sleep ((unsigned long)(delay * 1e3));
807#else 1949#else
808 struct timeval tv; 1950 struct timeval tv;
809 1951
810 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1952 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
829 1971
830 do 1972 do
831 ncur <<= 1; 1973 ncur <<= 1;
832 while (cnt > ncur); 1974 while (cnt > ncur);
833 1975
834 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1976 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
835 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1977 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
836 { 1978 {
837 ncur *= elem; 1979 ncur *= elem;
838 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1980 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
839 ncur = ncur - sizeof (void *) * 4; 1981 ncur = ncur - sizeof (void *) * 4;
… …
841 } 1983 }
842 1984
843 return ncur; 1985 return ncur;
844} 1986}
845 1987
846static noinline void * 1988noinline ecb_cold
1989static void *
847array_realloc (int elem, void *base, int *cur, int cnt) 1990array_realloc (int elem, void *base, int *cur, int cnt)
848{ 1991{
849 *cur = array_nextsize (elem, *cur, cnt); 1992 *cur = array_nextsize (elem, *cur, cnt);
850 return ev_realloc (base, elem * *cur); 1993 return ev_realloc (base, elem * *cur);
851} 1994}
852 1995
1996#define array_needsize_noinit(base,offset,count)
1997
853#define array_init_zero(base,count) \ 1998#define array_needsize_zerofill(base,offset,count) \
854 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1999 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
855 2000
856#define array_needsize(type,base,cur,cnt,init) \ 2001#define array_needsize(type,base,cur,cnt,init) \
857 if (expect_false ((cnt) > (cur))) \ 2002 if (expect_false ((cnt) > (cur))) \
858 { \ 2003 { \
859 int ocur_ = (cur); \ 2004 ecb_unused int ocur_ = (cur); \
860 (base) = (type *)array_realloc \ 2005 (base) = (type *)array_realloc \
861 (sizeof (type), (base), &(cur), (cnt)); \ 2006 (sizeof (type), (base), &(cur), (cnt)); \
862 init ((base) + (ocur_), (cur) - ocur_); \ 2007 init ((base), ocur_, ((cur) - ocur_)); \
863 } 2008 }
864 2009
865#if 0 2010#if 0
866#define array_slim(type,stem) \ 2011#define array_slim(type,stem) \
867 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2012 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
876 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2021 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
877 2022
878/*****************************************************************************/ 2023/*****************************************************************************/
879 2024
880/* dummy callback for pending events */ 2025/* dummy callback for pending events */
881static void noinline 2026noinline
2027static void
882pendingcb (EV_P_ ev_prepare *w, int revents) 2028pendingcb (EV_P_ ev_prepare *w, int revents)
883{ 2029{
884} 2030}
885 2031
886void noinline 2032noinline
2033void
887ev_feed_event (EV_P_ void *w, int revents) 2034ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
888{ 2035{
889 W w_ = (W)w; 2036 W w_ = (W)w;
890 int pri = ABSPRI (w_); 2037 int pri = ABSPRI (w_);
891 2038
892 if (expect_false (w_->pending)) 2039 if (expect_false (w_->pending))
893 pendings [pri][w_->pending - 1].events |= revents; 2040 pendings [pri][w_->pending - 1].events |= revents;
894 else 2041 else
895 { 2042 {
896 w_->pending = ++pendingcnt [pri]; 2043 w_->pending = ++pendingcnt [pri];
897 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2044 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
898 pendings [pri][w_->pending - 1].w = w_; 2045 pendings [pri][w_->pending - 1].w = w_;
899 pendings [pri][w_->pending - 1].events = revents; 2046 pendings [pri][w_->pending - 1].events = revents;
900 } 2047 }
2048
2049 pendingpri = NUMPRI - 1;
901} 2050}
902 2051
903inline_speed void 2052inline_speed void
904feed_reverse (EV_P_ W w) 2053feed_reverse (EV_P_ W w)
905{ 2054{
906 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2055 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
907 rfeeds [rfeedcnt++] = w; 2056 rfeeds [rfeedcnt++] = w;
908} 2057}
909 2058
910inline_size void 2059inline_size void
911feed_reverse_done (EV_P_ int revents) 2060feed_reverse_done (EV_P_ int revents)
… …
951 if (expect_true (!anfd->reify)) 2100 if (expect_true (!anfd->reify))
952 fd_event_nocheck (EV_A_ fd, revents); 2101 fd_event_nocheck (EV_A_ fd, revents);
953} 2102}
954 2103
955void 2104void
956ev_feed_fd_event (EV_P_ int fd, int revents) 2105ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
957{ 2106{
958 if (fd >= 0 && fd < anfdmax) 2107 if (fd >= 0 && fd < anfdmax)
959 fd_event_nocheck (EV_A_ fd, revents); 2108 fd_event_nocheck (EV_A_ fd, revents);
960} 2109}
961 2110
… …
964inline_size void 2113inline_size void
965fd_reify (EV_P) 2114fd_reify (EV_P)
966{ 2115{
967 int i; 2116 int i;
968 2117
2118#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2119 for (i = 0; i < fdchangecnt; ++i)
2120 {
2121 int fd = fdchanges [i];
2122 ANFD *anfd = anfds + fd;
2123
2124 if (anfd->reify & EV__IOFDSET && anfd->head)
2125 {
2126 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2127
2128 if (handle != anfd->handle)
2129 {
2130 unsigned long arg;
2131
2132 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2133
2134 /* handle changed, but fd didn't - we need to do it in two steps */
2135 backend_modify (EV_A_ fd, anfd->events, 0);
2136 anfd->events = 0;
2137 anfd->handle = handle;
2138 }
2139 }
2140 }
2141#endif
2142
969 for (i = 0; i < fdchangecnt; ++i) 2143 for (i = 0; i < fdchangecnt; ++i)
970 { 2144 {
971 int fd = fdchanges [i]; 2145 int fd = fdchanges [i];
972 ANFD *anfd = anfds + fd; 2146 ANFD *anfd = anfds + fd;
973 ev_io *w; 2147 ev_io *w;
… …
975 unsigned char o_events = anfd->events; 2149 unsigned char o_events = anfd->events;
976 unsigned char o_reify = anfd->reify; 2150 unsigned char o_reify = anfd->reify;
977 2151
978 anfd->reify = 0; 2152 anfd->reify = 0;
979 2153
980#if EV_SELECT_IS_WINSOCKET
981 if (o_reify & EV__IOFDSET)
982 {
983 unsigned long arg;
984 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
985 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
986 }
987#endif
988
989 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2154 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
990 { 2155 {
991 anfd->events = 0; 2156 anfd->events = 0;
992 2157
993 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2158 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1003 2168
1004 fdchangecnt = 0; 2169 fdchangecnt = 0;
1005} 2170}
1006 2171
1007/* something about the given fd changed */ 2172/* something about the given fd changed */
1008inline_size void 2173inline_size
2174void
1009fd_change (EV_P_ int fd, int flags) 2175fd_change (EV_P_ int fd, int flags)
1010{ 2176{
1011 unsigned char reify = anfds [fd].reify; 2177 unsigned char reify = anfds [fd].reify;
1012 anfds [fd].reify |= flags; 2178 anfds [fd].reify |= flags;
1013 2179
1014 if (expect_true (!reify)) 2180 if (expect_true (!reify))
1015 { 2181 {
1016 ++fdchangecnt; 2182 ++fdchangecnt;
1017 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2183 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1018 fdchanges [fdchangecnt - 1] = fd; 2184 fdchanges [fdchangecnt - 1] = fd;
1019 } 2185 }
1020} 2186}
1021 2187
1022/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2188/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1023inline_speed void 2189inline_speed ecb_cold void
1024fd_kill (EV_P_ int fd) 2190fd_kill (EV_P_ int fd)
1025{ 2191{
1026 ev_io *w; 2192 ev_io *w;
1027 2193
1028 while ((w = (ev_io *)anfds [fd].head)) 2194 while ((w = (ev_io *)anfds [fd].head))
… …
1031 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2197 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1032 } 2198 }
1033} 2199}
1034 2200
1035/* check whether the given fd is actually valid, for error recovery */ 2201/* check whether the given fd is actually valid, for error recovery */
1036inline_size int 2202inline_size ecb_cold int
1037fd_valid (int fd) 2203fd_valid (int fd)
1038{ 2204{
1039#ifdef _WIN32 2205#ifdef _WIN32
1040 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2206 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1041#else 2207#else
1042 return fcntl (fd, F_GETFD) != -1; 2208 return fcntl (fd, F_GETFD) != -1;
1043#endif 2209#endif
1044} 2210}
1045 2211
1046/* called on EBADF to verify fds */ 2212/* called on EBADF to verify fds */
1047static void noinline 2213noinline ecb_cold
2214static void
1048fd_ebadf (EV_P) 2215fd_ebadf (EV_P)
1049{ 2216{
1050 int fd; 2217 int fd;
1051 2218
1052 for (fd = 0; fd < anfdmax; ++fd) 2219 for (fd = 0; fd < anfdmax; ++fd)
… …
1054 if (!fd_valid (fd) && errno == EBADF) 2221 if (!fd_valid (fd) && errno == EBADF)
1055 fd_kill (EV_A_ fd); 2222 fd_kill (EV_A_ fd);
1056} 2223}
1057 2224
1058/* called on ENOMEM in select/poll to kill some fds and retry */ 2225/* called on ENOMEM in select/poll to kill some fds and retry */
1059static void noinline 2226noinline ecb_cold
2227static void
1060fd_enomem (EV_P) 2228fd_enomem (EV_P)
1061{ 2229{
1062 int fd; 2230 int fd;
1063 2231
1064 for (fd = anfdmax; fd--; ) 2232 for (fd = anfdmax; fd--; )
… …
1068 break; 2236 break;
1069 } 2237 }
1070} 2238}
1071 2239
1072/* usually called after fork if backend needs to re-arm all fds from scratch */ 2240/* usually called after fork if backend needs to re-arm all fds from scratch */
1073static void noinline 2241noinline
2242static void
1074fd_rearm_all (EV_P) 2243fd_rearm_all (EV_P)
1075{ 2244{
1076 int fd; 2245 int fd;
1077 2246
1078 for (fd = 0; fd < anfdmax; ++fd) 2247 for (fd = 0; fd < anfdmax; ++fd)
… …
1259 2428
1260/*****************************************************************************/ 2429/*****************************************************************************/
1261 2430
1262#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2431#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1263 2432
1264static void noinline 2433noinline ecb_cold
2434static void
1265evpipe_init (EV_P) 2435evpipe_init (EV_P)
1266{ 2436{
1267 if (!ev_is_active (&pipe_w)) 2437 if (!ev_is_active (&pipe_w))
1268 { 2438 {
2439 int fds [2];
2440
1269# if EV_USE_EVENTFD 2441# if EV_USE_EVENTFD
2442 fds [0] = -1;
1270 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2443 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1271 if (evfd < 0 && errno == EINVAL) 2444 if (fds [1] < 0 && errno == EINVAL)
1272 evfd = eventfd (0, 0); 2445 fds [1] = eventfd (0, 0);
1273 2446
1274 if (evfd >= 0) 2447 if (fds [1] < 0)
2448# endif
1275 { 2449 {
2450 while (pipe (fds))
2451 ev_syserr ("(libev) error creating signal/async pipe");
2452
2453 fd_intern (fds [0]);
2454 }
2455
1276 evpipe [0] = -1; 2456 evpipe [0] = fds [0];
1277 fd_intern (evfd); /* doing it twice doesn't hurt */ 2457
1278 ev_io_set (&pipe_w, evfd, EV_READ); 2458 if (evpipe [1] < 0)
2459 evpipe [1] = fds [1]; /* first call, set write fd */
2460 else
2461 {
2462 /* on subsequent calls, do not change evpipe [1] */
2463 /* so that evpipe_write can always rely on its value. */
2464 /* this branch does not do anything sensible on windows, */
2465 /* so must not be executed on windows */
2466
2467 dup2 (fds [1], evpipe [1]);
2468 close (fds [1]);
2469 }
2470
2471 fd_intern (evpipe [1]);
2472
2473 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2474 ev_io_start (EV_A_ &pipe_w);
2475 ev_unref (EV_A); /* watcher should not keep loop alive */
2476 }
2477}
2478
2479inline_speed void
2480evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2481{
2482 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2483
2484 if (expect_true (*flag))
2485 return;
2486
2487 *flag = 1;
2488 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2489
2490 pipe_write_skipped = 1;
2491
2492 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2493
2494 if (pipe_write_wanted)
2495 {
2496 int old_errno;
2497
2498 pipe_write_skipped = 0;
2499 ECB_MEMORY_FENCE_RELEASE;
2500
2501 old_errno = errno; /* save errno because write will clobber it */
2502
2503#if EV_USE_EVENTFD
2504 if (evpipe [0] < 0)
2505 {
2506 uint64_t counter = 1;
2507 write (evpipe [1], &counter, sizeof (uint64_t));
1279 } 2508 }
1280 else 2509 else
1281# endif 2510#endif
1282 { 2511 {
1283 while (pipe (evpipe)) 2512#ifdef _WIN32
1284 ev_syserr ("(libev) error creating signal/async pipe"); 2513 WSABUF buf;
1285 2514 DWORD sent;
1286 fd_intern (evpipe [0]); 2515 buf.buf = (char *)&buf;
1287 fd_intern (evpipe [1]); 2516 buf.len = 1;
1288 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2517 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2518#else
2519 write (evpipe [1], &(evpipe [1]), 1);
2520#endif
1289 } 2521 }
1290
1291 ev_io_start (EV_A_ &pipe_w);
1292 ev_unref (EV_A); /* watcher should not keep loop alive */
1293 }
1294}
1295
1296inline_size void
1297evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1298{
1299 if (!*flag)
1300 {
1301 int old_errno = errno; /* save errno because write might clobber it */
1302 char dummy;
1303
1304 *flag = 1;
1305
1306#if EV_USE_EVENTFD
1307 if (evfd >= 0)
1308 {
1309 uint64_t counter = 1;
1310 write (evfd, &counter, sizeof (uint64_t));
1311 }
1312 else
1313#endif
1314 /* win32 people keep sending patches that change this write() to send() */
1315 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1316 /* so when you think this write should be a send instead, please find out */
1317 /* where your send() is from - it's definitely not the microsoft send, and */
1318 /* tell me. thank you. */
1319 write (evpipe [1], &dummy, 1);
1320 2522
1321 errno = old_errno; 2523 errno = old_errno;
1322 } 2524 }
1323} 2525}
1324 2526
… …
1327static void 2529static void
1328pipecb (EV_P_ ev_io *iow, int revents) 2530pipecb (EV_P_ ev_io *iow, int revents)
1329{ 2531{
1330 int i; 2532 int i;
1331 2533
2534 if (revents & EV_READ)
2535 {
1332#if EV_USE_EVENTFD 2536#if EV_USE_EVENTFD
1333 if (evfd >= 0) 2537 if (evpipe [0] < 0)
1334 { 2538 {
1335 uint64_t counter; 2539 uint64_t counter;
1336 read (evfd, &counter, sizeof (uint64_t)); 2540 read (evpipe [1], &counter, sizeof (uint64_t));
1337 } 2541 }
1338 else 2542 else
1339#endif 2543#endif
1340 { 2544 {
1341 char dummy; 2545 char dummy[4];
1342 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2546#ifdef _WIN32
2547 WSABUF buf;
2548 DWORD recvd;
2549 DWORD flags = 0;
2550 buf.buf = dummy;
2551 buf.len = sizeof (dummy);
2552 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2553#else
1343 read (evpipe [0], &dummy, 1); 2554 read (evpipe [0], &dummy, sizeof (dummy));
2555#endif
2556 }
1344 } 2557 }
1345 2558
2559 pipe_write_skipped = 0;
2560
2561 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2562
2563#if EV_SIGNAL_ENABLE
1346 if (sig_pending) 2564 if (sig_pending)
1347 { 2565 {
1348 sig_pending = 0; 2566 sig_pending = 0;
2567
2568 ECB_MEMORY_FENCE;
1349 2569
1350 for (i = EV_NSIG - 1; i--; ) 2570 for (i = EV_NSIG - 1; i--; )
1351 if (expect_false (signals [i].pending)) 2571 if (expect_false (signals [i].pending))
1352 ev_feed_signal_event (EV_A_ i + 1); 2572 ev_feed_signal_event (EV_A_ i + 1);
1353 } 2573 }
2574#endif
1354 2575
1355#if EV_ASYNC_ENABLE 2576#if EV_ASYNC_ENABLE
1356 if (async_pending) 2577 if (async_pending)
1357 { 2578 {
1358 async_pending = 0; 2579 async_pending = 0;
2580
2581 ECB_MEMORY_FENCE;
1359 2582
1360 for (i = asynccnt; i--; ) 2583 for (i = asynccnt; i--; )
1361 if (asyncs [i]->sent) 2584 if (asyncs [i]->sent)
1362 { 2585 {
1363 asyncs [i]->sent = 0; 2586 asyncs [i]->sent = 0;
2587 ECB_MEMORY_FENCE_RELEASE;
1364 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2588 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1365 } 2589 }
1366 } 2590 }
1367#endif 2591#endif
1368} 2592}
1369 2593
1370/*****************************************************************************/ 2594/*****************************************************************************/
1371 2595
2596void
2597ev_feed_signal (int signum) EV_NOEXCEPT
2598{
2599#if EV_MULTIPLICITY
2600 EV_P;
2601 ECB_MEMORY_FENCE_ACQUIRE;
2602 EV_A = signals [signum - 1].loop;
2603
2604 if (!EV_A)
2605 return;
2606#endif
2607
2608 signals [signum - 1].pending = 1;
2609 evpipe_write (EV_A_ &sig_pending);
2610}
2611
1372static void 2612static void
1373ev_sighandler (int signum) 2613ev_sighandler (int signum)
1374{ 2614{
1375#if EV_MULTIPLICITY
1376 EV_P = signals [signum - 1].loop;
1377#endif
1378
1379#ifdef _WIN32 2615#ifdef _WIN32
1380 signal (signum, ev_sighandler); 2616 signal (signum, ev_sighandler);
1381#endif 2617#endif
1382 2618
1383 signals [signum - 1].pending = 1; 2619 ev_feed_signal (signum);
1384 evpipe_write (EV_A_ &sig_pending);
1385} 2620}
1386 2621
1387void noinline 2622noinline
2623void
1388ev_feed_signal_event (EV_P_ int signum) 2624ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1389{ 2625{
1390 WL w; 2626 WL w;
1391 2627
1392 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2628 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1393 return; 2629 return;
1394 2630
1395 --signum; 2631 --signum;
1396 2632
1397#if EV_MULTIPLICITY 2633#if EV_MULTIPLICITY
… …
1401 if (expect_false (signals [signum].loop != EV_A)) 2637 if (expect_false (signals [signum].loop != EV_A))
1402 return; 2638 return;
1403#endif 2639#endif
1404 2640
1405 signals [signum].pending = 0; 2641 signals [signum].pending = 0;
2642 ECB_MEMORY_FENCE_RELEASE;
1406 2643
1407 for (w = signals [signum].head; w; w = w->next) 2644 for (w = signals [signum].head; w; w = w->next)
1408 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2645 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1409} 2646}
1410 2647
… …
1489 2726
1490#endif 2727#endif
1491 2728
1492/*****************************************************************************/ 2729/*****************************************************************************/
1493 2730
2731#if EV_USE_IOCP
2732# include "ev_iocp.c"
2733#endif
1494#if EV_USE_PORT 2734#if EV_USE_PORT
1495# include "ev_port.c" 2735# include "ev_port.c"
1496#endif 2736#endif
1497#if EV_USE_KQUEUE 2737#if EV_USE_KQUEUE
1498# include "ev_kqueue.c" 2738# include "ev_kqueue.c"
1499#endif 2739#endif
1500#if EV_USE_EPOLL 2740#if EV_USE_EPOLL
1501# include "ev_epoll.c" 2741# include "ev_epoll.c"
1502#endif 2742#endif
2743#if EV_USE_LINUXAIO
2744# include "ev_linuxaio.c"
2745#endif
1503#if EV_USE_POLL 2746#if EV_USE_POLL
1504# include "ev_poll.c" 2747# include "ev_poll.c"
1505#endif 2748#endif
1506#if EV_USE_SELECT 2749#if EV_USE_SELECT
1507# include "ev_select.c" 2750# include "ev_select.c"
1508#endif 2751#endif
1509 2752
1510int 2753ecb_cold int
1511ev_version_major (void) 2754ev_version_major (void) EV_NOEXCEPT
1512{ 2755{
1513 return EV_VERSION_MAJOR; 2756 return EV_VERSION_MAJOR;
1514} 2757}
1515 2758
1516int 2759ecb_cold int
1517ev_version_minor (void) 2760ev_version_minor (void) EV_NOEXCEPT
1518{ 2761{
1519 return EV_VERSION_MINOR; 2762 return EV_VERSION_MINOR;
1520} 2763}
1521 2764
1522/* return true if we are running with elevated privileges and should ignore env variables */ 2765/* return true if we are running with elevated privileges and should ignore env variables */
1523int inline_size 2766inline_size ecb_cold int
1524enable_secure (void) 2767enable_secure (void)
1525{ 2768{
1526#ifdef _WIN32 2769#ifdef _WIN32
1527 return 0; 2770 return 0;
1528#else 2771#else
1529 return getuid () != geteuid () 2772 return getuid () != geteuid ()
1530 || getgid () != getegid (); 2773 || getgid () != getegid ();
1531#endif 2774#endif
1532} 2775}
1533 2776
2777ecb_cold
1534unsigned int 2778unsigned int
1535ev_supported_backends (void) 2779ev_supported_backends (void) EV_NOEXCEPT
1536{ 2780{
1537 unsigned int flags = 0; 2781 unsigned int flags = 0;
1538 2782
1539 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2783 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1540 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2784 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1541 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2785 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2786 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1542 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2787 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1543 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2788 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1544 2789
1545 return flags; 2790 return flags;
1546} 2791}
1547 2792
2793ecb_cold
1548unsigned int 2794unsigned int
1549ev_recommended_backends (void) 2795ev_recommended_backends (void) EV_NOEXCEPT
1550{ 2796{
1551 unsigned int flags = ev_supported_backends (); 2797 unsigned int flags = ev_supported_backends ();
1552 2798
1553#ifndef __NetBSD__ 2799#ifndef __NetBSD__
1554 /* kqueue is borked on everything but netbsd apparently */ 2800 /* kqueue is borked on everything but netbsd apparently */
… …
1562#endif 2808#endif
1563#ifdef __FreeBSD__ 2809#ifdef __FreeBSD__
1564 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2810 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1565#endif 2811#endif
1566 2812
2813 /* TODO: linuxaio is very experimental */
2814#if !EV_RECOMMEND_LINUXAIO
2815 flags &= ~EVBACKEND_LINUXAIO;
2816#endif
2817
1567 return flags; 2818 return flags;
1568} 2819}
1569 2820
2821ecb_cold
1570unsigned int 2822unsigned int
1571ev_embeddable_backends (void) 2823ev_embeddable_backends (void) EV_NOEXCEPT
1572{ 2824{
1573 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2825 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1574 2826
1575 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2827 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1576 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2828 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1578 2830
1579 return flags; 2831 return flags;
1580} 2832}
1581 2833
1582unsigned int 2834unsigned int
1583ev_backend (EV_P) 2835ev_backend (EV_P) EV_NOEXCEPT
1584{ 2836{
1585 return backend; 2837 return backend;
1586} 2838}
1587 2839
1588#if EV_FEATURE_API 2840#if EV_FEATURE_API
1589unsigned int 2841unsigned int
1590ev_iteration (EV_P) 2842ev_iteration (EV_P) EV_NOEXCEPT
1591{ 2843{
1592 return loop_count; 2844 return loop_count;
1593} 2845}
1594 2846
1595unsigned int 2847unsigned int
1596ev_depth (EV_P) 2848ev_depth (EV_P) EV_NOEXCEPT
1597{ 2849{
1598 return loop_depth; 2850 return loop_depth;
1599} 2851}
1600 2852
1601void 2853void
1602ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2854ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1603{ 2855{
1604 io_blocktime = interval; 2856 io_blocktime = interval;
1605} 2857}
1606 2858
1607void 2859void
1608ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2860ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1609{ 2861{
1610 timeout_blocktime = interval; 2862 timeout_blocktime = interval;
1611} 2863}
1612 2864
1613void 2865void
1614ev_set_userdata (EV_P_ void *data) 2866ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1615{ 2867{
1616 userdata = data; 2868 userdata = data;
1617} 2869}
1618 2870
1619void * 2871void *
1620ev_userdata (EV_P) 2872ev_userdata (EV_P) EV_NOEXCEPT
1621{ 2873{
1622 return userdata; 2874 return userdata;
1623} 2875}
1624 2876
2877void
1625void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2878ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1626{ 2879{
1627 invoke_cb = invoke_pending_cb; 2880 invoke_cb = invoke_pending_cb;
1628} 2881}
1629 2882
2883void
1630void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2884ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1631{ 2885{
1632 release_cb = release; 2886 release_cb = release;
1633 acquire_cb = acquire; 2887 acquire_cb = acquire;
1634} 2888}
1635#endif 2889#endif
1636 2890
1637/* initialise a loop structure, must be zero-initialised */ 2891/* initialise a loop structure, must be zero-initialised */
1638static void noinline 2892noinline ecb_cold
2893static void
1639loop_init (EV_P_ unsigned int flags) 2894loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1640{ 2895{
1641 if (!backend) 2896 if (!backend)
1642 { 2897 {
2898 origflags = flags;
2899
1643#if EV_USE_REALTIME 2900#if EV_USE_REALTIME
1644 if (!have_realtime) 2901 if (!have_realtime)
1645 { 2902 {
1646 struct timespec ts; 2903 struct timespec ts;
1647 2904
… …
1669 if (!(flags & EVFLAG_NOENV) 2926 if (!(flags & EVFLAG_NOENV)
1670 && !enable_secure () 2927 && !enable_secure ()
1671 && getenv ("LIBEV_FLAGS")) 2928 && getenv ("LIBEV_FLAGS"))
1672 flags = atoi (getenv ("LIBEV_FLAGS")); 2929 flags = atoi (getenv ("LIBEV_FLAGS"));
1673 2930
1674 ev_rt_now = ev_time (); 2931 ev_rt_now = ev_time ();
1675 mn_now = get_clock (); 2932 mn_now = get_clock ();
1676 now_floor = mn_now; 2933 now_floor = mn_now;
1677 rtmn_diff = ev_rt_now - mn_now; 2934 rtmn_diff = ev_rt_now - mn_now;
1678#if EV_FEATURE_API 2935#if EV_FEATURE_API
1679 invoke_cb = ev_invoke_pending; 2936 invoke_cb = ev_invoke_pending;
1680#endif 2937#endif
1681 2938
1682 io_blocktime = 0.; 2939 io_blocktime = 0.;
1683 timeout_blocktime = 0.; 2940 timeout_blocktime = 0.;
1684 backend = 0; 2941 backend = 0;
1685 backend_fd = -1; 2942 backend_fd = -1;
1686 sig_pending = 0; 2943 sig_pending = 0;
1687#if EV_ASYNC_ENABLE 2944#if EV_ASYNC_ENABLE
1688 async_pending = 0; 2945 async_pending = 0;
1689#endif 2946#endif
2947 pipe_write_skipped = 0;
2948 pipe_write_wanted = 0;
2949 evpipe [0] = -1;
2950 evpipe [1] = -1;
1690#if EV_USE_INOTIFY 2951#if EV_USE_INOTIFY
1691 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2952 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1692#endif 2953#endif
1693#if EV_USE_SIGNALFD 2954#if EV_USE_SIGNALFD
1694 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2955 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1695#endif 2956#endif
1696 2957
1697 if (!(flags & 0x0000ffffU)) 2958 if (!(flags & EVBACKEND_MASK))
1698 flags |= ev_recommended_backends (); 2959 flags |= ev_recommended_backends ();
1699 2960
2961#if EV_USE_IOCP
2962 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2963#endif
1700#if EV_USE_PORT 2964#if EV_USE_PORT
1701 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2965 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1702#endif 2966#endif
1703#if EV_USE_KQUEUE 2967#if EV_USE_KQUEUE
1704 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2968 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2969#endif
2970#if EV_USE_LINUXAIO
2971 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1705#endif 2972#endif
1706#if EV_USE_EPOLL 2973#if EV_USE_EPOLL
1707 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2974 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1708#endif 2975#endif
1709#if EV_USE_POLL 2976#if EV_USE_POLL
1710 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2977 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1711#endif 2978#endif
1712#if EV_USE_SELECT 2979#if EV_USE_SELECT
1713 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2980 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1714#endif 2981#endif
1715 2982
1716 ev_prepare_init (&pending_w, pendingcb); 2983 ev_prepare_init (&pending_w, pendingcb);
1717 2984
1718#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2985#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1721#endif 2988#endif
1722 } 2989 }
1723} 2990}
1724 2991
1725/* free up a loop structure */ 2992/* free up a loop structure */
1726static void noinline 2993ecb_cold
2994void
1727loop_destroy (EV_P) 2995ev_loop_destroy (EV_P)
1728{ 2996{
1729 int i; 2997 int i;
2998
2999#if EV_MULTIPLICITY
3000 /* mimic free (0) */
3001 if (!EV_A)
3002 return;
3003#endif
3004
3005#if EV_CLEANUP_ENABLE
3006 /* queue cleanup watchers (and execute them) */
3007 if (expect_false (cleanupcnt))
3008 {
3009 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3010 EV_INVOKE_PENDING;
3011 }
3012#endif
3013
3014#if EV_CHILD_ENABLE
3015 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3016 {
3017 ev_ref (EV_A); /* child watcher */
3018 ev_signal_stop (EV_A_ &childev);
3019 }
3020#endif
1730 3021
1731 if (ev_is_active (&pipe_w)) 3022 if (ev_is_active (&pipe_w))
1732 { 3023 {
1733 /*ev_ref (EV_A);*/ 3024 /*ev_ref (EV_A);*/
1734 /*ev_io_stop (EV_A_ &pipe_w);*/ 3025 /*ev_io_stop (EV_A_ &pipe_w);*/
1735 3026
1736#if EV_USE_EVENTFD
1737 if (evfd >= 0)
1738 close (evfd);
1739#endif
1740
1741 if (evpipe [0] >= 0)
1742 {
1743 EV_WIN32_CLOSE_FD (evpipe [0]); 3027 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1744 EV_WIN32_CLOSE_FD (evpipe [1]); 3028 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1745 }
1746 } 3029 }
1747 3030
1748#if EV_USE_SIGNALFD 3031#if EV_USE_SIGNALFD
1749 if (ev_is_active (&sigfd_w)) 3032 if (ev_is_active (&sigfd_w))
1750 close (sigfd); 3033 close (sigfd);
… …
1756#endif 3039#endif
1757 3040
1758 if (backend_fd >= 0) 3041 if (backend_fd >= 0)
1759 close (backend_fd); 3042 close (backend_fd);
1760 3043
3044#if EV_USE_IOCP
3045 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3046#endif
1761#if EV_USE_PORT 3047#if EV_USE_PORT
1762 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3048 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1763#endif 3049#endif
1764#if EV_USE_KQUEUE 3050#if EV_USE_KQUEUE
1765 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3051 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3052#endif
3053#if EV_USE_LINUXAIO
3054 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1766#endif 3055#endif
1767#if EV_USE_EPOLL 3056#if EV_USE_EPOLL
1768 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3057 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1769#endif 3058#endif
1770#if EV_USE_POLL 3059#if EV_USE_POLL
1771 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3060 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1772#endif 3061#endif
1773#if EV_USE_SELECT 3062#if EV_USE_SELECT
1774 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3063 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1775#endif 3064#endif
1776 3065
1777 for (i = NUMPRI; i--; ) 3066 for (i = NUMPRI; i--; )
1778 { 3067 {
1779 array_free (pending, [i]); 3068 array_free (pending, [i]);
… …
1792 array_free (periodic, EMPTY); 3081 array_free (periodic, EMPTY);
1793#endif 3082#endif
1794#if EV_FORK_ENABLE 3083#if EV_FORK_ENABLE
1795 array_free (fork, EMPTY); 3084 array_free (fork, EMPTY);
1796#endif 3085#endif
3086#if EV_CLEANUP_ENABLE
3087 array_free (cleanup, EMPTY);
3088#endif
1797 array_free (prepare, EMPTY); 3089 array_free (prepare, EMPTY);
1798 array_free (check, EMPTY); 3090 array_free (check, EMPTY);
1799#if EV_ASYNC_ENABLE 3091#if EV_ASYNC_ENABLE
1800 array_free (async, EMPTY); 3092 array_free (async, EMPTY);
1801#endif 3093#endif
1802 3094
1803 backend = 0; 3095 backend = 0;
3096
3097#if EV_MULTIPLICITY
3098 if (ev_is_default_loop (EV_A))
3099#endif
3100 ev_default_loop_ptr = 0;
3101#if EV_MULTIPLICITY
3102 else
3103 ev_free (EV_A);
3104#endif
1804} 3105}
1805 3106
1806#if EV_USE_INOTIFY 3107#if EV_USE_INOTIFY
1807inline_size void infy_fork (EV_P); 3108inline_size void infy_fork (EV_P);
1808#endif 3109#endif
1809 3110
1810inline_size void 3111inline_size void
1811loop_fork (EV_P) 3112loop_fork (EV_P)
1812{ 3113{
1813#if EV_USE_PORT 3114#if EV_USE_PORT
1814 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3115 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1815#endif 3116#endif
1816#if EV_USE_KQUEUE 3117#if EV_USE_KQUEUE
1817 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3118 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3119#endif
3120#if EV_USE_LINUXAIO
3121 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1818#endif 3122#endif
1819#if EV_USE_EPOLL 3123#if EV_USE_EPOLL
1820 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3124 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1821#endif 3125#endif
1822#if EV_USE_INOTIFY 3126#if EV_USE_INOTIFY
1823 infy_fork (EV_A); 3127 infy_fork (EV_A);
1824#endif 3128#endif
1825 3129
3130#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1826 if (ev_is_active (&pipe_w)) 3131 if (ev_is_active (&pipe_w) && postfork != 2)
1827 { 3132 {
1828 /* this "locks" the handlers against writing to the pipe */ 3133 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1829 /* while we modify the fd vars */
1830 sig_pending = 1;
1831#if EV_ASYNC_ENABLE
1832 async_pending = 1;
1833#endif
1834 3134
1835 ev_ref (EV_A); 3135 ev_ref (EV_A);
1836 ev_io_stop (EV_A_ &pipe_w); 3136 ev_io_stop (EV_A_ &pipe_w);
1837 3137
1838#if EV_USE_EVENTFD
1839 if (evfd >= 0)
1840 close (evfd);
1841#endif
1842
1843 if (evpipe [0] >= 0) 3138 if (evpipe [0] >= 0)
1844 {
1845 EV_WIN32_CLOSE_FD (evpipe [0]); 3139 EV_WIN32_CLOSE_FD (evpipe [0]);
1846 EV_WIN32_CLOSE_FD (evpipe [1]);
1847 }
1848 3140
1849#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1850 evpipe_init (EV_A); 3141 evpipe_init (EV_A);
1851 /* now iterate over everything, in case we missed something */ 3142 /* iterate over everything, in case we missed something before */
1852 pipecb (EV_A_ &pipe_w, EV_READ); 3143 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1853#endif
1854 } 3144 }
3145#endif
1855 3146
1856 postfork = 0; 3147 postfork = 0;
1857} 3148}
1858 3149
1859#if EV_MULTIPLICITY 3150#if EV_MULTIPLICITY
1860 3151
3152ecb_cold
1861struct ev_loop * 3153struct ev_loop *
1862ev_loop_new (unsigned int flags) 3154ev_loop_new (unsigned int flags) EV_NOEXCEPT
1863{ 3155{
1864 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3156 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1865 3157
1866 memset (EV_A, 0, sizeof (struct ev_loop)); 3158 memset (EV_A, 0, sizeof (struct ev_loop));
1867 loop_init (EV_A_ flags); 3159 loop_init (EV_A_ flags);
1868 3160
1869 if (ev_backend (EV_A)) 3161 if (ev_backend (EV_A))
1870 return EV_A; 3162 return EV_A;
1871 3163
3164 ev_free (EV_A);
1872 return 0; 3165 return 0;
1873} 3166}
1874 3167
1875void
1876ev_loop_destroy (EV_P)
1877{
1878 loop_destroy (EV_A);
1879 ev_free (loop);
1880}
1881
1882void
1883ev_loop_fork (EV_P)
1884{
1885 postfork = 1; /* must be in line with ev_default_fork */
1886}
1887#endif /* multiplicity */ 3168#endif /* multiplicity */
1888 3169
1889#if EV_VERIFY 3170#if EV_VERIFY
1890static void noinline 3171noinline ecb_cold
3172static void
1891verify_watcher (EV_P_ W w) 3173verify_watcher (EV_P_ W w)
1892{ 3174{
1893 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3175 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1894 3176
1895 if (w->pending) 3177 if (w->pending)
1896 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3178 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1897} 3179}
1898 3180
1899static void noinline 3181noinline ecb_cold
3182static void
1900verify_heap (EV_P_ ANHE *heap, int N) 3183verify_heap (EV_P_ ANHE *heap, int N)
1901{ 3184{
1902 int i; 3185 int i;
1903 3186
1904 for (i = HEAP0; i < N + HEAP0; ++i) 3187 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1909 3192
1910 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3193 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1911 } 3194 }
1912} 3195}
1913 3196
1914static void noinline 3197noinline ecb_cold
3198static void
1915array_verify (EV_P_ W *ws, int cnt) 3199array_verify (EV_P_ W *ws, int cnt)
1916{ 3200{
1917 while (cnt--) 3201 while (cnt--)
1918 { 3202 {
1919 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3203 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1921 } 3205 }
1922} 3206}
1923#endif 3207#endif
1924 3208
1925#if EV_FEATURE_API 3209#if EV_FEATURE_API
1926void 3210void ecb_cold
1927ev_verify (EV_P) 3211ev_verify (EV_P) EV_NOEXCEPT
1928{ 3212{
1929#if EV_VERIFY 3213#if EV_VERIFY
1930 int i; 3214 int i;
1931 WL w; 3215 WL w, w2;
1932 3216
1933 assert (activecnt >= -1); 3217 assert (activecnt >= -1);
1934 3218
1935 assert (fdchangemax >= fdchangecnt); 3219 assert (fdchangemax >= fdchangecnt);
1936 for (i = 0; i < fdchangecnt; ++i) 3220 for (i = 0; i < fdchangecnt; ++i)
1937 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3221 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1938 3222
1939 assert (anfdmax >= 0); 3223 assert (anfdmax >= 0);
1940 for (i = 0; i < anfdmax; ++i) 3224 for (i = 0; i < anfdmax; ++i)
3225 {
3226 int j = 0;
3227
1941 for (w = anfds [i].head; w; w = w->next) 3228 for (w = w2 = anfds [i].head; w; w = w->next)
1942 { 3229 {
1943 verify_watcher (EV_A_ (W)w); 3230 verify_watcher (EV_A_ (W)w);
3231
3232 if (j++ & 1)
3233 {
3234 assert (("libev: io watcher list contains a loop", w != w2));
3235 w2 = w2->next;
3236 }
3237
1944 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3238 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1945 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3239 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1946 } 3240 }
3241 }
1947 3242
1948 assert (timermax >= timercnt); 3243 assert (timermax >= timercnt);
1949 verify_heap (EV_A_ timers, timercnt); 3244 verify_heap (EV_A_ timers, timercnt);
1950 3245
1951#if EV_PERIODIC_ENABLE 3246#if EV_PERIODIC_ENABLE
… …
1966#if EV_FORK_ENABLE 3261#if EV_FORK_ENABLE
1967 assert (forkmax >= forkcnt); 3262 assert (forkmax >= forkcnt);
1968 array_verify (EV_A_ (W *)forks, forkcnt); 3263 array_verify (EV_A_ (W *)forks, forkcnt);
1969#endif 3264#endif
1970 3265
3266#if EV_CLEANUP_ENABLE
3267 assert (cleanupmax >= cleanupcnt);
3268 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3269#endif
3270
1971#if EV_ASYNC_ENABLE 3271#if EV_ASYNC_ENABLE
1972 assert (asyncmax >= asynccnt); 3272 assert (asyncmax >= asynccnt);
1973 array_verify (EV_A_ (W *)asyncs, asynccnt); 3273 array_verify (EV_A_ (W *)asyncs, asynccnt);
1974#endif 3274#endif
1975 3275
… …
1992#endif 3292#endif
1993} 3293}
1994#endif 3294#endif
1995 3295
1996#if EV_MULTIPLICITY 3296#if EV_MULTIPLICITY
3297ecb_cold
1997struct ev_loop * 3298struct ev_loop *
1998ev_default_loop_init (unsigned int flags)
1999#else 3299#else
2000int 3300int
3301#endif
2001ev_default_loop (unsigned int flags) 3302ev_default_loop (unsigned int flags) EV_NOEXCEPT
2002#endif
2003{ 3303{
2004 if (!ev_default_loop_ptr) 3304 if (!ev_default_loop_ptr)
2005 { 3305 {
2006#if EV_MULTIPLICITY 3306#if EV_MULTIPLICITY
2007 EV_P = ev_default_loop_ptr = &default_loop_struct; 3307 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2026 3326
2027 return ev_default_loop_ptr; 3327 return ev_default_loop_ptr;
2028} 3328}
2029 3329
2030void 3330void
2031ev_default_destroy (void) 3331ev_loop_fork (EV_P) EV_NOEXCEPT
2032{ 3332{
2033#if EV_MULTIPLICITY 3333 postfork = 1;
2034 EV_P = ev_default_loop_ptr;
2035#endif
2036
2037 ev_default_loop_ptr = 0;
2038
2039#if EV_CHILD_ENABLE
2040 ev_ref (EV_A); /* child watcher */
2041 ev_signal_stop (EV_A_ &childev);
2042#endif
2043
2044 loop_destroy (EV_A);
2045}
2046
2047void
2048ev_default_fork (void)
2049{
2050#if EV_MULTIPLICITY
2051 EV_P = ev_default_loop_ptr;
2052#endif
2053
2054 postfork = 1; /* must be in line with ev_loop_fork */
2055} 3334}
2056 3335
2057/*****************************************************************************/ 3336/*****************************************************************************/
2058 3337
2059void 3338void
… …
2061{ 3340{
2062 EV_CB_INVOKE ((W)w, revents); 3341 EV_CB_INVOKE ((W)w, revents);
2063} 3342}
2064 3343
2065unsigned int 3344unsigned int
2066ev_pending_count (EV_P) 3345ev_pending_count (EV_P) EV_NOEXCEPT
2067{ 3346{
2068 int pri; 3347 int pri;
2069 unsigned int count = 0; 3348 unsigned int count = 0;
2070 3349
2071 for (pri = NUMPRI; pri--; ) 3350 for (pri = NUMPRI; pri--; )
2072 count += pendingcnt [pri]; 3351 count += pendingcnt [pri];
2073 3352
2074 return count; 3353 return count;
2075} 3354}
2076 3355
2077void noinline 3356noinline
3357void
2078ev_invoke_pending (EV_P) 3358ev_invoke_pending (EV_P)
2079{ 3359{
2080 int pri; 3360 pendingpri = NUMPRI;
2081 3361
2082 for (pri = NUMPRI; pri--; ) 3362 do
3363 {
3364 --pendingpri;
3365
3366 /* pendingpri possibly gets modified in the inner loop */
2083 while (pendingcnt [pri]) 3367 while (pendingcnt [pendingpri])
2084 { 3368 {
2085 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3369 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2086 3370
2087 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2088 /* ^ this is no longer true, as pending_w could be here */
2089
2090 p->w->pending = 0; 3371 p->w->pending = 0;
2091 EV_CB_INVOKE (p->w, p->events); 3372 EV_CB_INVOKE (p->w, p->events);
2092 EV_FREQUENT_CHECK; 3373 EV_FREQUENT_CHECK;
2093 } 3374 }
3375 }
3376 while (pendingpri);
2094} 3377}
2095 3378
2096#if EV_IDLE_ENABLE 3379#if EV_IDLE_ENABLE
2097/* make idle watchers pending. this handles the "call-idle */ 3380/* make idle watchers pending. this handles the "call-idle */
2098/* only when higher priorities are idle" logic */ 3381/* only when higher priorities are idle" logic */
… …
2155 feed_reverse_done (EV_A_ EV_TIMER); 3438 feed_reverse_done (EV_A_ EV_TIMER);
2156 } 3439 }
2157} 3440}
2158 3441
2159#if EV_PERIODIC_ENABLE 3442#if EV_PERIODIC_ENABLE
3443
3444noinline
3445static void
3446periodic_recalc (EV_P_ ev_periodic *w)
3447{
3448 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3449 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3450
3451 /* the above almost always errs on the low side */
3452 while (at <= ev_rt_now)
3453 {
3454 ev_tstamp nat = at + w->interval;
3455
3456 /* when resolution fails us, we use ev_rt_now */
3457 if (expect_false (nat == at))
3458 {
3459 at = ev_rt_now;
3460 break;
3461 }
3462
3463 at = nat;
3464 }
3465
3466 ev_at (w) = at;
3467}
3468
2160/* make periodics pending */ 3469/* make periodics pending */
2161inline_size void 3470inline_size void
2162periodics_reify (EV_P) 3471periodics_reify (EV_P)
2163{ 3472{
2164 EV_FREQUENT_CHECK; 3473 EV_FREQUENT_CHECK;
2165 3474
2166 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3475 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2167 { 3476 {
2168 int feed_count = 0;
2169
2170 do 3477 do
2171 { 3478 {
2172 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3479 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2173 3480
2174 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3481 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2183 ANHE_at_cache (periodics [HEAP0]); 3490 ANHE_at_cache (periodics [HEAP0]);
2184 downheap (periodics, periodiccnt, HEAP0); 3491 downheap (periodics, periodiccnt, HEAP0);
2185 } 3492 }
2186 else if (w->interval) 3493 else if (w->interval)
2187 { 3494 {
2188 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3495 periodic_recalc (EV_A_ w);
2189 /* if next trigger time is not sufficiently in the future, put it there */
2190 /* this might happen because of floating point inexactness */
2191 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2192 {
2193 ev_at (w) += w->interval;
2194
2195 /* if interval is unreasonably low we might still have a time in the past */
2196 /* so correct this. this will make the periodic very inexact, but the user */
2197 /* has effectively asked to get triggered more often than possible */
2198 if (ev_at (w) < ev_rt_now)
2199 ev_at (w) = ev_rt_now;
2200 }
2201
2202 ANHE_at_cache (periodics [HEAP0]); 3496 ANHE_at_cache (periodics [HEAP0]);
2203 downheap (periodics, periodiccnt, HEAP0); 3497 downheap (periodics, periodiccnt, HEAP0);
2204 } 3498 }
2205 else 3499 else
2206 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3500 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2214 } 3508 }
2215} 3509}
2216 3510
2217/* simply recalculate all periodics */ 3511/* simply recalculate all periodics */
2218/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3512/* TODO: maybe ensure that at least one event happens when jumping forward? */
2219static void noinline 3513noinline ecb_cold
3514static void
2220periodics_reschedule (EV_P) 3515periodics_reschedule (EV_P)
2221{ 3516{
2222 int i; 3517 int i;
2223 3518
2224 /* adjust periodics after time jump */ 3519 /* adjust periodics after time jump */
… …
2227 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3522 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2228 3523
2229 if (w->reschedule_cb) 3524 if (w->reschedule_cb)
2230 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3525 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2231 else if (w->interval) 3526 else if (w->interval)
2232 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3527 periodic_recalc (EV_A_ w);
2233 3528
2234 ANHE_at_cache (periodics [i]); 3529 ANHE_at_cache (periodics [i]);
2235 } 3530 }
2236 3531
2237 reheap (periodics, periodiccnt); 3532 reheap (periodics, periodiccnt);
2238} 3533}
2239#endif 3534#endif
2240 3535
2241/* adjust all timers by a given offset */ 3536/* adjust all timers by a given offset */
2242static void noinline 3537noinline ecb_cold
3538static void
2243timers_reschedule (EV_P_ ev_tstamp adjust) 3539timers_reschedule (EV_P_ ev_tstamp adjust)
2244{ 3540{
2245 int i; 3541 int i;
2246 3542
2247 for (i = 0; i < timercnt; ++i) 3543 for (i = 0; i < timercnt; ++i)
… …
2284 * doesn't hurt either as we only do this on time-jumps or 3580 * doesn't hurt either as we only do this on time-jumps or
2285 * in the unlikely event of having been preempted here. 3581 * in the unlikely event of having been preempted here.
2286 */ 3582 */
2287 for (i = 4; --i; ) 3583 for (i = 4; --i; )
2288 { 3584 {
3585 ev_tstamp diff;
2289 rtmn_diff = ev_rt_now - mn_now; 3586 rtmn_diff = ev_rt_now - mn_now;
2290 3587
3588 diff = odiff - rtmn_diff;
3589
2291 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3590 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2292 return; /* all is well */ 3591 return; /* all is well */
2293 3592
2294 ev_rt_now = ev_time (); 3593 ev_rt_now = ev_time ();
2295 mn_now = get_clock (); 3594 mn_now = get_clock ();
2296 now_floor = mn_now; 3595 now_floor = mn_now;
… …
2318 3617
2319 mn_now = ev_rt_now; 3618 mn_now = ev_rt_now;
2320 } 3619 }
2321} 3620}
2322 3621
2323void 3622int
2324ev_run (EV_P_ int flags) 3623ev_run (EV_P_ int flags)
2325{ 3624{
2326#if EV_FEATURE_API 3625#if EV_FEATURE_API
2327 ++loop_depth; 3626 ++loop_depth;
2328#endif 3627#endif
… …
2386 ev_tstamp prev_mn_now = mn_now; 3685 ev_tstamp prev_mn_now = mn_now;
2387 3686
2388 /* update time to cancel out callback processing overhead */ 3687 /* update time to cancel out callback processing overhead */
2389 time_update (EV_A_ 1e100); 3688 time_update (EV_A_ 1e100);
2390 3689
3690 /* from now on, we want a pipe-wake-up */
3691 pipe_write_wanted = 1;
3692
3693 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3694
2391 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3695 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2392 { 3696 {
2393 waittime = MAX_BLOCKTIME; 3697 waittime = MAX_BLOCKTIME;
2394 3698
2395 if (timercnt) 3699 if (timercnt)
2396 { 3700 {
2397 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3701 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2398 if (waittime > to) waittime = to; 3702 if (waittime > to) waittime = to;
2399 } 3703 }
2400 3704
2401#if EV_PERIODIC_ENABLE 3705#if EV_PERIODIC_ENABLE
2402 if (periodiccnt) 3706 if (periodiccnt)
2403 { 3707 {
2404 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3708 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2405 if (waittime > to) waittime = to; 3709 if (waittime > to) waittime = to;
2406 } 3710 }
2407#endif 3711#endif
2408 3712
2409 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3713 /* don't let timeouts decrease the waittime below timeout_blocktime */
2410 if (expect_false (waittime < timeout_blocktime)) 3714 if (expect_false (waittime < timeout_blocktime))
2411 waittime = timeout_blocktime; 3715 waittime = timeout_blocktime;
3716
3717 /* at this point, we NEED to wait, so we have to ensure */
3718 /* to pass a minimum nonzero value to the backend */
3719 if (expect_false (waittime < backend_mintime))
3720 waittime = backend_mintime;
2412 3721
2413 /* extra check because io_blocktime is commonly 0 */ 3722 /* extra check because io_blocktime is commonly 0 */
2414 if (expect_false (io_blocktime)) 3723 if (expect_false (io_blocktime))
2415 { 3724 {
2416 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3725 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2417 3726
2418 if (sleeptime > waittime - backend_fudge) 3727 if (sleeptime > waittime - backend_mintime)
2419 sleeptime = waittime - backend_fudge; 3728 sleeptime = waittime - backend_mintime;
2420 3729
2421 if (expect_true (sleeptime > 0.)) 3730 if (expect_true (sleeptime > 0.))
2422 { 3731 {
2423 ev_sleep (sleeptime); 3732 ev_sleep (sleeptime);
2424 waittime -= sleeptime; 3733 waittime -= sleeptime;
… …
2431#endif 3740#endif
2432 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3741 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2433 backend_poll (EV_A_ waittime); 3742 backend_poll (EV_A_ waittime);
2434 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3743 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2435 3744
3745 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3746
3747 ECB_MEMORY_FENCE_ACQUIRE;
3748 if (pipe_write_skipped)
3749 {
3750 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3751 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3752 }
3753
3754
2436 /* update ev_rt_now, do magic */ 3755 /* update ev_rt_now, do magic */
2437 time_update (EV_A_ waittime + sleeptime); 3756 time_update (EV_A_ waittime + sleeptime);
2438 } 3757 }
2439 3758
2440 /* queue pending timers and reschedule them */ 3759 /* queue pending timers and reschedule them */
… …
2466 loop_done = EVBREAK_CANCEL; 3785 loop_done = EVBREAK_CANCEL;
2467 3786
2468#if EV_FEATURE_API 3787#if EV_FEATURE_API
2469 --loop_depth; 3788 --loop_depth;
2470#endif 3789#endif
2471}
2472 3790
3791 return activecnt;
3792}
3793
2473void 3794void
2474ev_break (EV_P_ int how) 3795ev_break (EV_P_ int how) EV_NOEXCEPT
2475{ 3796{
2476 loop_done = how; 3797 loop_done = how;
2477} 3798}
2478 3799
2479void 3800void
2480ev_ref (EV_P) 3801ev_ref (EV_P) EV_NOEXCEPT
2481{ 3802{
2482 ++activecnt; 3803 ++activecnt;
2483} 3804}
2484 3805
2485void 3806void
2486ev_unref (EV_P) 3807ev_unref (EV_P) EV_NOEXCEPT
2487{ 3808{
2488 --activecnt; 3809 --activecnt;
2489} 3810}
2490 3811
2491void 3812void
2492ev_now_update (EV_P) 3813ev_now_update (EV_P) EV_NOEXCEPT
2493{ 3814{
2494 time_update (EV_A_ 1e100); 3815 time_update (EV_A_ 1e100);
2495} 3816}
2496 3817
2497void 3818void
2498ev_suspend (EV_P) 3819ev_suspend (EV_P) EV_NOEXCEPT
2499{ 3820{
2500 ev_now_update (EV_A); 3821 ev_now_update (EV_A);
2501} 3822}
2502 3823
2503void 3824void
2504ev_resume (EV_P) 3825ev_resume (EV_P) EV_NOEXCEPT
2505{ 3826{
2506 ev_tstamp mn_prev = mn_now; 3827 ev_tstamp mn_prev = mn_now;
2507 3828
2508 ev_now_update (EV_A); 3829 ev_now_update (EV_A);
2509 timers_reschedule (EV_A_ mn_now - mn_prev); 3830 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2548 w->pending = 0; 3869 w->pending = 0;
2549 } 3870 }
2550} 3871}
2551 3872
2552int 3873int
2553ev_clear_pending (EV_P_ void *w) 3874ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2554{ 3875{
2555 W w_ = (W)w; 3876 W w_ = (W)w;
2556 int pending = w_->pending; 3877 int pending = w_->pending;
2557 3878
2558 if (expect_true (pending)) 3879 if (expect_true (pending))
… …
2590 w->active = 0; 3911 w->active = 0;
2591} 3912}
2592 3913
2593/*****************************************************************************/ 3914/*****************************************************************************/
2594 3915
2595void noinline 3916noinline
3917void
2596ev_io_start (EV_P_ ev_io *w) 3918ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2597{ 3919{
2598 int fd = w->fd; 3920 int fd = w->fd;
2599 3921
2600 if (expect_false (ev_is_active (w))) 3922 if (expect_false (ev_is_active (w)))
2601 return; 3923 return;
… …
2604 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3926 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2605 3927
2606 EV_FREQUENT_CHECK; 3928 EV_FREQUENT_CHECK;
2607 3929
2608 ev_start (EV_A_ (W)w, 1); 3930 ev_start (EV_A_ (W)w, 1);
2609 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3931 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2610 wlist_add (&anfds[fd].head, (WL)w); 3932 wlist_add (&anfds[fd].head, (WL)w);
3933
3934 /* common bug, apparently */
3935 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2611 3936
2612 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3937 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2613 w->events &= ~EV__IOFDSET; 3938 w->events &= ~EV__IOFDSET;
2614 3939
2615 EV_FREQUENT_CHECK; 3940 EV_FREQUENT_CHECK;
2616} 3941}
2617 3942
2618void noinline 3943noinline
3944void
2619ev_io_stop (EV_P_ ev_io *w) 3945ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2620{ 3946{
2621 clear_pending (EV_A_ (W)w); 3947 clear_pending (EV_A_ (W)w);
2622 if (expect_false (!ev_is_active (w))) 3948 if (expect_false (!ev_is_active (w)))
2623 return; 3949 return;
2624 3950
… …
2632 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3958 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2633 3959
2634 EV_FREQUENT_CHECK; 3960 EV_FREQUENT_CHECK;
2635} 3961}
2636 3962
2637void noinline 3963noinline
3964void
2638ev_timer_start (EV_P_ ev_timer *w) 3965ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2639{ 3966{
2640 if (expect_false (ev_is_active (w))) 3967 if (expect_false (ev_is_active (w)))
2641 return; 3968 return;
2642 3969
2643 ev_at (w) += mn_now; 3970 ev_at (w) += mn_now;
… …
2646 3973
2647 EV_FREQUENT_CHECK; 3974 EV_FREQUENT_CHECK;
2648 3975
2649 ++timercnt; 3976 ++timercnt;
2650 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3977 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2651 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3978 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2652 ANHE_w (timers [ev_active (w)]) = (WT)w; 3979 ANHE_w (timers [ev_active (w)]) = (WT)w;
2653 ANHE_at_cache (timers [ev_active (w)]); 3980 ANHE_at_cache (timers [ev_active (w)]);
2654 upheap (timers, ev_active (w)); 3981 upheap (timers, ev_active (w));
2655 3982
2656 EV_FREQUENT_CHECK; 3983 EV_FREQUENT_CHECK;
2657 3984
2658 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3985 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2659} 3986}
2660 3987
2661void noinline 3988noinline
3989void
2662ev_timer_stop (EV_P_ ev_timer *w) 3990ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2663{ 3991{
2664 clear_pending (EV_A_ (W)w); 3992 clear_pending (EV_A_ (W)w);
2665 if (expect_false (!ev_is_active (w))) 3993 if (expect_false (!ev_is_active (w)))
2666 return; 3994 return;
2667 3995
… …
2686 ev_stop (EV_A_ (W)w); 4014 ev_stop (EV_A_ (W)w);
2687 4015
2688 EV_FREQUENT_CHECK; 4016 EV_FREQUENT_CHECK;
2689} 4017}
2690 4018
2691void noinline 4019noinline
4020void
2692ev_timer_again (EV_P_ ev_timer *w) 4021ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2693{ 4022{
2694 EV_FREQUENT_CHECK; 4023 EV_FREQUENT_CHECK;
4024
4025 clear_pending (EV_A_ (W)w);
2695 4026
2696 if (ev_is_active (w)) 4027 if (ev_is_active (w))
2697 { 4028 {
2698 if (w->repeat) 4029 if (w->repeat)
2699 { 4030 {
… …
2712 4043
2713 EV_FREQUENT_CHECK; 4044 EV_FREQUENT_CHECK;
2714} 4045}
2715 4046
2716ev_tstamp 4047ev_tstamp
2717ev_timer_remaining (EV_P_ ev_timer *w) 4048ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2718{ 4049{
2719 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4050 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2720} 4051}
2721 4052
2722#if EV_PERIODIC_ENABLE 4053#if EV_PERIODIC_ENABLE
2723void noinline 4054noinline
4055void
2724ev_periodic_start (EV_P_ ev_periodic *w) 4056ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2725{ 4057{
2726 if (expect_false (ev_is_active (w))) 4058 if (expect_false (ev_is_active (w)))
2727 return; 4059 return;
2728 4060
2729 if (w->reschedule_cb) 4061 if (w->reschedule_cb)
2730 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4062 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2731 else if (w->interval) 4063 else if (w->interval)
2732 { 4064 {
2733 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4065 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2734 /* this formula differs from the one in periodic_reify because we do not always round up */ 4066 periodic_recalc (EV_A_ w);
2735 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2736 } 4067 }
2737 else 4068 else
2738 ev_at (w) = w->offset; 4069 ev_at (w) = w->offset;
2739 4070
2740 EV_FREQUENT_CHECK; 4071 EV_FREQUENT_CHECK;
2741 4072
2742 ++periodiccnt; 4073 ++periodiccnt;
2743 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4074 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2744 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4075 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2745 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4076 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2746 ANHE_at_cache (periodics [ev_active (w)]); 4077 ANHE_at_cache (periodics [ev_active (w)]);
2747 upheap (periodics, ev_active (w)); 4078 upheap (periodics, ev_active (w));
2748 4079
2749 EV_FREQUENT_CHECK; 4080 EV_FREQUENT_CHECK;
2750 4081
2751 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4082 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2752} 4083}
2753 4084
2754void noinline 4085noinline
4086void
2755ev_periodic_stop (EV_P_ ev_periodic *w) 4087ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2756{ 4088{
2757 clear_pending (EV_A_ (W)w); 4089 clear_pending (EV_A_ (W)w);
2758 if (expect_false (!ev_is_active (w))) 4090 if (expect_false (!ev_is_active (w)))
2759 return; 4091 return;
2760 4092
… …
2777 ev_stop (EV_A_ (W)w); 4109 ev_stop (EV_A_ (W)w);
2778 4110
2779 EV_FREQUENT_CHECK; 4111 EV_FREQUENT_CHECK;
2780} 4112}
2781 4113
2782void noinline 4114noinline
4115void
2783ev_periodic_again (EV_P_ ev_periodic *w) 4116ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2784{ 4117{
2785 /* TODO: use adjustheap and recalculation */ 4118 /* TODO: use adjustheap and recalculation */
2786 ev_periodic_stop (EV_A_ w); 4119 ev_periodic_stop (EV_A_ w);
2787 ev_periodic_start (EV_A_ w); 4120 ev_periodic_start (EV_A_ w);
2788} 4121}
… …
2792# define SA_RESTART 0 4125# define SA_RESTART 0
2793#endif 4126#endif
2794 4127
2795#if EV_SIGNAL_ENABLE 4128#if EV_SIGNAL_ENABLE
2796 4129
2797void noinline 4130noinline
4131void
2798ev_signal_start (EV_P_ ev_signal *w) 4132ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2799{ 4133{
2800 if (expect_false (ev_is_active (w))) 4134 if (expect_false (ev_is_active (w)))
2801 return; 4135 return;
2802 4136
2803 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4137 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2805#if EV_MULTIPLICITY 4139#if EV_MULTIPLICITY
2806 assert (("libev: a signal must not be attached to two different loops", 4140 assert (("libev: a signal must not be attached to two different loops",
2807 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4141 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2808 4142
2809 signals [w->signum - 1].loop = EV_A; 4143 signals [w->signum - 1].loop = EV_A;
4144 ECB_MEMORY_FENCE_RELEASE;
2810#endif 4145#endif
2811 4146
2812 EV_FREQUENT_CHECK; 4147 EV_FREQUENT_CHECK;
2813 4148
2814#if EV_USE_SIGNALFD 4149#if EV_USE_SIGNALFD
… …
2861 sa.sa_handler = ev_sighandler; 4196 sa.sa_handler = ev_sighandler;
2862 sigfillset (&sa.sa_mask); 4197 sigfillset (&sa.sa_mask);
2863 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4198 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2864 sigaction (w->signum, &sa, 0); 4199 sigaction (w->signum, &sa, 0);
2865 4200
4201 if (origflags & EVFLAG_NOSIGMASK)
4202 {
2866 sigemptyset (&sa.sa_mask); 4203 sigemptyset (&sa.sa_mask);
2867 sigaddset (&sa.sa_mask, w->signum); 4204 sigaddset (&sa.sa_mask, w->signum);
2868 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4205 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4206 }
2869#endif 4207#endif
2870 } 4208 }
2871 4209
2872 EV_FREQUENT_CHECK; 4210 EV_FREQUENT_CHECK;
2873} 4211}
2874 4212
2875void noinline 4213noinline
4214void
2876ev_signal_stop (EV_P_ ev_signal *w) 4215ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2877{ 4216{
2878 clear_pending (EV_A_ (W)w); 4217 clear_pending (EV_A_ (W)w);
2879 if (expect_false (!ev_is_active (w))) 4218 if (expect_false (!ev_is_active (w)))
2880 return; 4219 return;
2881 4220
… …
2912#endif 4251#endif
2913 4252
2914#if EV_CHILD_ENABLE 4253#if EV_CHILD_ENABLE
2915 4254
2916void 4255void
2917ev_child_start (EV_P_ ev_child *w) 4256ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2918{ 4257{
2919#if EV_MULTIPLICITY 4258#if EV_MULTIPLICITY
2920 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4259 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2921#endif 4260#endif
2922 if (expect_false (ev_is_active (w))) 4261 if (expect_false (ev_is_active (w)))
… …
2929 4268
2930 EV_FREQUENT_CHECK; 4269 EV_FREQUENT_CHECK;
2931} 4270}
2932 4271
2933void 4272void
2934ev_child_stop (EV_P_ ev_child *w) 4273ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2935{ 4274{
2936 clear_pending (EV_A_ (W)w); 4275 clear_pending (EV_A_ (W)w);
2937 if (expect_false (!ev_is_active (w))) 4276 if (expect_false (!ev_is_active (w)))
2938 return; 4277 return;
2939 4278
… …
2956 4295
2957#define DEF_STAT_INTERVAL 5.0074891 4296#define DEF_STAT_INTERVAL 5.0074891
2958#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4297#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2959#define MIN_STAT_INTERVAL 0.1074891 4298#define MIN_STAT_INTERVAL 0.1074891
2960 4299
2961static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4300noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2962 4301
2963#if EV_USE_INOTIFY 4302#if EV_USE_INOTIFY
2964 4303
2965/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4304/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2966# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4305# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2967 4306
2968static void noinline 4307noinline
4308static void
2969infy_add (EV_P_ ev_stat *w) 4309infy_add (EV_P_ ev_stat *w)
2970{ 4310{
2971 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4311 w->wd = inotify_add_watch (fs_fd, w->path,
4312 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4313 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4314 | IN_DONT_FOLLOW | IN_MASK_ADD);
2972 4315
2973 if (w->wd >= 0) 4316 if (w->wd >= 0)
2974 { 4317 {
2975 struct statfs sfs; 4318 struct statfs sfs;
2976 4319
… …
2980 4323
2981 if (!fs_2625) 4324 if (!fs_2625)
2982 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4325 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2983 else if (!statfs (w->path, &sfs) 4326 else if (!statfs (w->path, &sfs)
2984 && (sfs.f_type == 0x1373 /* devfs */ 4327 && (sfs.f_type == 0x1373 /* devfs */
4328 || sfs.f_type == 0x4006 /* fat */
4329 || sfs.f_type == 0x4d44 /* msdos */
2985 || sfs.f_type == 0xEF53 /* ext2/3 */ 4330 || sfs.f_type == 0xEF53 /* ext2/3 */
4331 || sfs.f_type == 0x72b6 /* jffs2 */
4332 || sfs.f_type == 0x858458f6 /* ramfs */
4333 || sfs.f_type == 0x5346544e /* ntfs */
2986 || sfs.f_type == 0x3153464a /* jfs */ 4334 || sfs.f_type == 0x3153464a /* jfs */
4335 || sfs.f_type == 0x9123683e /* btrfs */
2987 || sfs.f_type == 0x52654973 /* reiser3 */ 4336 || sfs.f_type == 0x52654973 /* reiser3 */
2988 || sfs.f_type == 0x01021994 /* tempfs */ 4337 || sfs.f_type == 0x01021994 /* tmpfs */
2989 || sfs.f_type == 0x58465342 /* xfs */)) 4338 || sfs.f_type == 0x58465342 /* xfs */))
2990 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4339 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2991 else 4340 else
2992 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4341 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2993 } 4342 }
… …
3014 if (!pend || pend == path) 4363 if (!pend || pend == path)
3015 break; 4364 break;
3016 4365
3017 *pend = 0; 4366 *pend = 0;
3018 w->wd = inotify_add_watch (fs_fd, path, mask); 4367 w->wd = inotify_add_watch (fs_fd, path, mask);
3019 } 4368 }
3020 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4369 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3021 } 4370 }
3022 } 4371 }
3023 4372
3024 if (w->wd >= 0) 4373 if (w->wd >= 0)
… …
3028 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4377 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3029 ev_timer_again (EV_A_ &w->timer); 4378 ev_timer_again (EV_A_ &w->timer);
3030 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4379 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3031} 4380}
3032 4381
3033static void noinline 4382noinline
4383static void
3034infy_del (EV_P_ ev_stat *w) 4384infy_del (EV_P_ ev_stat *w)
3035{ 4385{
3036 int slot; 4386 int slot;
3037 int wd = w->wd; 4387 int wd = w->wd;
3038 4388
… …
3045 4395
3046 /* remove this watcher, if others are watching it, they will rearm */ 4396 /* remove this watcher, if others are watching it, they will rearm */
3047 inotify_rm_watch (fs_fd, wd); 4397 inotify_rm_watch (fs_fd, wd);
3048} 4398}
3049 4399
3050static void noinline 4400noinline
4401static void
3051infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4402infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3052{ 4403{
3053 if (slot < 0) 4404 if (slot < 0)
3054 /* overflow, need to check for all hash slots */ 4405 /* overflow, need to check for all hash slots */
3055 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4406 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3091 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4442 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3092 ofs += sizeof (struct inotify_event) + ev->len; 4443 ofs += sizeof (struct inotify_event) + ev->len;
3093 } 4444 }
3094} 4445}
3095 4446
3096inline_size void 4447inline_size ecb_cold
4448void
3097ev_check_2625 (EV_P) 4449ev_check_2625 (EV_P)
3098{ 4450{
3099 /* kernels < 2.6.25 are borked 4451 /* kernels < 2.6.25 are borked
3100 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4452 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3101 */ 4453 */
… …
3106} 4458}
3107 4459
3108inline_size int 4460inline_size int
3109infy_newfd (void) 4461infy_newfd (void)
3110{ 4462{
3111#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4463#if defined IN_CLOEXEC && defined IN_NONBLOCK
3112 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4464 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3113 if (fd >= 0) 4465 if (fd >= 0)
3114 return fd; 4466 return fd;
3115#endif 4467#endif
3116 return inotify_init (); 4468 return inotify_init ();
… …
3191#else 4543#else
3192# define EV_LSTAT(p,b) lstat (p, b) 4544# define EV_LSTAT(p,b) lstat (p, b)
3193#endif 4545#endif
3194 4546
3195void 4547void
3196ev_stat_stat (EV_P_ ev_stat *w) 4548ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3197{ 4549{
3198 if (lstat (w->path, &w->attr) < 0) 4550 if (lstat (w->path, &w->attr) < 0)
3199 w->attr.st_nlink = 0; 4551 w->attr.st_nlink = 0;
3200 else if (!w->attr.st_nlink) 4552 else if (!w->attr.st_nlink)
3201 w->attr.st_nlink = 1; 4553 w->attr.st_nlink = 1;
3202} 4554}
3203 4555
3204static void noinline 4556noinline
4557static void
3205stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4558stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3206{ 4559{
3207 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4560 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3208 4561
3209 ev_statdata prev = w->attr; 4562 ev_statdata prev = w->attr;
… …
3240 ev_feed_event (EV_A_ w, EV_STAT); 4593 ev_feed_event (EV_A_ w, EV_STAT);
3241 } 4594 }
3242} 4595}
3243 4596
3244void 4597void
3245ev_stat_start (EV_P_ ev_stat *w) 4598ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3246{ 4599{
3247 if (expect_false (ev_is_active (w))) 4600 if (expect_false (ev_is_active (w)))
3248 return; 4601 return;
3249 4602
3250 ev_stat_stat (EV_A_ w); 4603 ev_stat_stat (EV_A_ w);
… …
3271 4624
3272 EV_FREQUENT_CHECK; 4625 EV_FREQUENT_CHECK;
3273} 4626}
3274 4627
3275void 4628void
3276ev_stat_stop (EV_P_ ev_stat *w) 4629ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3277{ 4630{
3278 clear_pending (EV_A_ (W)w); 4631 clear_pending (EV_A_ (W)w);
3279 if (expect_false (!ev_is_active (w))) 4632 if (expect_false (!ev_is_active (w)))
3280 return; 4633 return;
3281 4634
… …
3297} 4650}
3298#endif 4651#endif
3299 4652
3300#if EV_IDLE_ENABLE 4653#if EV_IDLE_ENABLE
3301void 4654void
3302ev_idle_start (EV_P_ ev_idle *w) 4655ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3303{ 4656{
3304 if (expect_false (ev_is_active (w))) 4657 if (expect_false (ev_is_active (w)))
3305 return; 4658 return;
3306 4659
3307 pri_adjust (EV_A_ (W)w); 4660 pri_adjust (EV_A_ (W)w);
… …
3312 int active = ++idlecnt [ABSPRI (w)]; 4665 int active = ++idlecnt [ABSPRI (w)];
3313 4666
3314 ++idleall; 4667 ++idleall;
3315 ev_start (EV_A_ (W)w, active); 4668 ev_start (EV_A_ (W)w, active);
3316 4669
3317 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4670 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3318 idles [ABSPRI (w)][active - 1] = w; 4671 idles [ABSPRI (w)][active - 1] = w;
3319 } 4672 }
3320 4673
3321 EV_FREQUENT_CHECK; 4674 EV_FREQUENT_CHECK;
3322} 4675}
3323 4676
3324void 4677void
3325ev_idle_stop (EV_P_ ev_idle *w) 4678ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3326{ 4679{
3327 clear_pending (EV_A_ (W)w); 4680 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4681 if (expect_false (!ev_is_active (w)))
3329 return; 4682 return;
3330 4683
… …
3344} 4697}
3345#endif 4698#endif
3346 4699
3347#if EV_PREPARE_ENABLE 4700#if EV_PREPARE_ENABLE
3348void 4701void
3349ev_prepare_start (EV_P_ ev_prepare *w) 4702ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3350{ 4703{
3351 if (expect_false (ev_is_active (w))) 4704 if (expect_false (ev_is_active (w)))
3352 return; 4705 return;
3353 4706
3354 EV_FREQUENT_CHECK; 4707 EV_FREQUENT_CHECK;
3355 4708
3356 ev_start (EV_A_ (W)w, ++preparecnt); 4709 ev_start (EV_A_ (W)w, ++preparecnt);
3357 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4710 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3358 prepares [preparecnt - 1] = w; 4711 prepares [preparecnt - 1] = w;
3359 4712
3360 EV_FREQUENT_CHECK; 4713 EV_FREQUENT_CHECK;
3361} 4714}
3362 4715
3363void 4716void
3364ev_prepare_stop (EV_P_ ev_prepare *w) 4717ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3365{ 4718{
3366 clear_pending (EV_A_ (W)w); 4719 clear_pending (EV_A_ (W)w);
3367 if (expect_false (!ev_is_active (w))) 4720 if (expect_false (!ev_is_active (w)))
3368 return; 4721 return;
3369 4722
… …
3382} 4735}
3383#endif 4736#endif
3384 4737
3385#if EV_CHECK_ENABLE 4738#if EV_CHECK_ENABLE
3386void 4739void
3387ev_check_start (EV_P_ ev_check *w) 4740ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3388{ 4741{
3389 if (expect_false (ev_is_active (w))) 4742 if (expect_false (ev_is_active (w)))
3390 return; 4743 return;
3391 4744
3392 EV_FREQUENT_CHECK; 4745 EV_FREQUENT_CHECK;
3393 4746
3394 ev_start (EV_A_ (W)w, ++checkcnt); 4747 ev_start (EV_A_ (W)w, ++checkcnt);
3395 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4748 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3396 checks [checkcnt - 1] = w; 4749 checks [checkcnt - 1] = w;
3397 4750
3398 EV_FREQUENT_CHECK; 4751 EV_FREQUENT_CHECK;
3399} 4752}
3400 4753
3401void 4754void
3402ev_check_stop (EV_P_ ev_check *w) 4755ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3403{ 4756{
3404 clear_pending (EV_A_ (W)w); 4757 clear_pending (EV_A_ (W)w);
3405 if (expect_false (!ev_is_active (w))) 4758 if (expect_false (!ev_is_active (w)))
3406 return; 4759 return;
3407 4760
… …
3419 EV_FREQUENT_CHECK; 4772 EV_FREQUENT_CHECK;
3420} 4773}
3421#endif 4774#endif
3422 4775
3423#if EV_EMBED_ENABLE 4776#if EV_EMBED_ENABLE
3424void noinline 4777noinline
4778void
3425ev_embed_sweep (EV_P_ ev_embed *w) 4779ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3426{ 4780{
3427 ev_run (w->other, EVRUN_NOWAIT); 4781 ev_run (w->other, EVRUN_NOWAIT);
3428} 4782}
3429 4783
3430static void 4784static void
… …
3478 ev_idle_stop (EV_A_ idle); 4832 ev_idle_stop (EV_A_ idle);
3479} 4833}
3480#endif 4834#endif
3481 4835
3482void 4836void
3483ev_embed_start (EV_P_ ev_embed *w) 4837ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3484{ 4838{
3485 if (expect_false (ev_is_active (w))) 4839 if (expect_false (ev_is_active (w)))
3486 return; 4840 return;
3487 4841
3488 { 4842 {
… …
3509 4863
3510 EV_FREQUENT_CHECK; 4864 EV_FREQUENT_CHECK;
3511} 4865}
3512 4866
3513void 4867void
3514ev_embed_stop (EV_P_ ev_embed *w) 4868ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3515{ 4869{
3516 clear_pending (EV_A_ (W)w); 4870 clear_pending (EV_A_ (W)w);
3517 if (expect_false (!ev_is_active (w))) 4871 if (expect_false (!ev_is_active (w)))
3518 return; 4872 return;
3519 4873
… …
3529} 4883}
3530#endif 4884#endif
3531 4885
3532#if EV_FORK_ENABLE 4886#if EV_FORK_ENABLE
3533void 4887void
3534ev_fork_start (EV_P_ ev_fork *w) 4888ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3535{ 4889{
3536 if (expect_false (ev_is_active (w))) 4890 if (expect_false (ev_is_active (w)))
3537 return; 4891 return;
3538 4892
3539 EV_FREQUENT_CHECK; 4893 EV_FREQUENT_CHECK;
3540 4894
3541 ev_start (EV_A_ (W)w, ++forkcnt); 4895 ev_start (EV_A_ (W)w, ++forkcnt);
3542 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4896 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3543 forks [forkcnt - 1] = w; 4897 forks [forkcnt - 1] = w;
3544 4898
3545 EV_FREQUENT_CHECK; 4899 EV_FREQUENT_CHECK;
3546} 4900}
3547 4901
3548void 4902void
3549ev_fork_stop (EV_P_ ev_fork *w) 4903ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3550{ 4904{
3551 clear_pending (EV_A_ (W)w); 4905 clear_pending (EV_A_ (W)w);
3552 if (expect_false (!ev_is_active (w))) 4906 if (expect_false (!ev_is_active (w)))
3553 return; 4907 return;
3554 4908
… …
3565 4919
3566 EV_FREQUENT_CHECK; 4920 EV_FREQUENT_CHECK;
3567} 4921}
3568#endif 4922#endif
3569 4923
3570#if EV_ASYNC_ENABLE 4924#if EV_CLEANUP_ENABLE
3571void 4925void
3572ev_async_start (EV_P_ ev_async *w) 4926ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3573{ 4927{
3574 if (expect_false (ev_is_active (w))) 4928 if (expect_false (ev_is_active (w)))
3575 return; 4929 return;
3576 4930
3577 w->sent = 0;
3578
3579 evpipe_init (EV_A);
3580
3581 EV_FREQUENT_CHECK; 4931 EV_FREQUENT_CHECK;
3582 4932
3583 ev_start (EV_A_ (W)w, ++asynccnt); 4933 ev_start (EV_A_ (W)w, ++cleanupcnt);
3584 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4934 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3585 asyncs [asynccnt - 1] = w; 4935 cleanups [cleanupcnt - 1] = w;
3586 4936
4937 /* cleanup watchers should never keep a refcount on the loop */
4938 ev_unref (EV_A);
3587 EV_FREQUENT_CHECK; 4939 EV_FREQUENT_CHECK;
3588} 4940}
3589 4941
3590void 4942void
3591ev_async_stop (EV_P_ ev_async *w) 4943ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3592{ 4944{
3593 clear_pending (EV_A_ (W)w); 4945 clear_pending (EV_A_ (W)w);
3594 if (expect_false (!ev_is_active (w))) 4946 if (expect_false (!ev_is_active (w)))
3595 return; 4947 return;
3596 4948
3597 EV_FREQUENT_CHECK; 4949 EV_FREQUENT_CHECK;
4950 ev_ref (EV_A);
4951
4952 {
4953 int active = ev_active (w);
4954
4955 cleanups [active - 1] = cleanups [--cleanupcnt];
4956 ev_active (cleanups [active - 1]) = active;
4957 }
4958
4959 ev_stop (EV_A_ (W)w);
4960
4961 EV_FREQUENT_CHECK;
4962}
4963#endif
4964
4965#if EV_ASYNC_ENABLE
4966void
4967ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4968{
4969 if (expect_false (ev_is_active (w)))
4970 return;
4971
4972 w->sent = 0;
4973
4974 evpipe_init (EV_A);
4975
4976 EV_FREQUENT_CHECK;
4977
4978 ev_start (EV_A_ (W)w, ++asynccnt);
4979 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4980 asyncs [asynccnt - 1] = w;
4981
4982 EV_FREQUENT_CHECK;
4983}
4984
4985void
4986ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4987{
4988 clear_pending (EV_A_ (W)w);
4989 if (expect_false (!ev_is_active (w)))
4990 return;
4991
4992 EV_FREQUENT_CHECK;
3598 4993
3599 { 4994 {
3600 int active = ev_active (w); 4995 int active = ev_active (w);
3601 4996
3602 asyncs [active - 1] = asyncs [--asynccnt]; 4997 asyncs [active - 1] = asyncs [--asynccnt];
… …
3607 5002
3608 EV_FREQUENT_CHECK; 5003 EV_FREQUENT_CHECK;
3609} 5004}
3610 5005
3611void 5006void
3612ev_async_send (EV_P_ ev_async *w) 5007ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3613{ 5008{
3614 w->sent = 1; 5009 w->sent = 1;
3615 evpipe_write (EV_A_ &async_pending); 5010 evpipe_write (EV_A_ &async_pending);
3616} 5011}
3617#endif 5012#endif
… …
3654 5049
3655 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5050 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3656} 5051}
3657 5052
3658void 5053void
3659ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5054ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3660{ 5055{
3661 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5056 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3662
3663 if (expect_false (!once))
3664 {
3665 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3666 return;
3667 }
3668 5057
3669 once->cb = cb; 5058 once->cb = cb;
3670 once->arg = arg; 5059 once->arg = arg;
3671 5060
3672 ev_init (&once->io, once_cb_io); 5061 ev_init (&once->io, once_cb_io);
… …
3685} 5074}
3686 5075
3687/*****************************************************************************/ 5076/*****************************************************************************/
3688 5077
3689#if EV_WALK_ENABLE 5078#if EV_WALK_ENABLE
5079ecb_cold
3690void 5080void
3691ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5081ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3692{ 5082{
3693 int i, j; 5083 int i, j;
3694 ev_watcher_list *wl, *wn; 5084 ev_watcher_list *wl, *wn;
3695 5085
3696 if (types & (EV_IO | EV_EMBED)) 5086 if (types & (EV_IO | EV_EMBED))
… …
3739 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5129 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3740#endif 5130#endif
3741 5131
3742#if EV_IDLE_ENABLE 5132#if EV_IDLE_ENABLE
3743 if (types & EV_IDLE) 5133 if (types & EV_IDLE)
3744 for (j = NUMPRI; i--; ) 5134 for (j = NUMPRI; j--; )
3745 for (i = idlecnt [j]; i--; ) 5135 for (i = idlecnt [j]; i--; )
3746 cb (EV_A_ EV_IDLE, idles [j][i]); 5136 cb (EV_A_ EV_IDLE, idles [j][i]);
3747#endif 5137#endif
3748 5138
3749#if EV_FORK_ENABLE 5139#if EV_FORK_ENABLE
… …
3802 5192
3803#if EV_MULTIPLICITY 5193#if EV_MULTIPLICITY
3804 #include "ev_wrap.h" 5194 #include "ev_wrap.h"
3805#endif 5195#endif
3806 5196
3807EV_CPP(})
3808

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