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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.492 by root, Sat Jun 22 16:25:53 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif 114# endif
109# else 115# else
110# undef EV_USE_EPOLL 116# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
112# endif 127# endif
113 128
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE 130# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
… …
156# define EV_USE_EVENTFD 0 171# define EV_USE_EVENTFD 0
157# endif 172# endif
158 173
159#endif 174#endif
160 175
161#include <math.h> 176/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184#define _DARWIN_UNLIMITED_SELECT 1
185
162#include <stdlib.h> 186#include <stdlib.h>
163#include <string.h> 187#include <string.h>
164#include <fcntl.h> 188#include <fcntl.h>
165#include <stddef.h> 189#include <stddef.h>
166 190
… …
178# include EV_H 202# include EV_H
179#else 203#else
180# include "ev.h" 204# include "ev.h"
181#endif 205#endif
182 206
183EV_CPP(extern "C" {) 207#if EV_NO_THREADS
208# undef EV_NO_SMP
209# define EV_NO_SMP 1
210# undef ECB_NO_THREADS
211# define ECB_NO_THREADS 1
212#endif
213#if EV_NO_SMP
214# undef EV_NO_SMP
215# define ECB_NO_SMP 1
216#endif
184 217
185#ifndef _WIN32 218#ifndef _WIN32
186# include <sys/time.h> 219# include <sys/time.h>
187# include <sys/wait.h> 220# include <sys/wait.h>
188# include <unistd.h> 221# include <unistd.h>
189#else 222#else
190# include <io.h> 223# include <io.h>
191# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
192# include <windows.h> 226# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
195# endif 229# endif
196# undef EV_AVOID_STDIO 230# undef EV_AVOID_STDIO
197#endif 231#endif
198 232
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 233/* this block tries to deduce configuration from header-defined symbols and defaults */
208 234
209/* try to deduce the maximum number of signals on this platform */ 235/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 236#if defined EV_NSIG
211/* use what's provided */ 237/* use what's provided */
212#elif defined (NSIG) 238#elif defined NSIG
213# define EV_NSIG (NSIG) 239# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 240#elif defined _NSIG
215# define EV_NSIG (_NSIG) 241# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 242#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 243# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 244#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 245# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 246#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 247# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 248#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 249# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 250#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 251# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 252#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 253# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 254#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 255# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 256#else
231# error "unable to find value for NSIG, please report" 257# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 258#endif
233/* but consider reporting it, too! :) */ 259
234# define EV_NSIG 65 260#ifndef EV_USE_FLOOR
261# define EV_USE_FLOOR 0
235#endif 262#endif
236 263
237#ifndef EV_USE_CLOCK_SYSCALL 264#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 265# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 266# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 267# else
241# define EV_USE_CLOCK_SYSCALL 0 268# define EV_USE_CLOCK_SYSCALL 0
242# endif 269# endif
243#endif 270#endif
244 271
272#if !(_POSIX_TIMERS > 0)
273# ifndef EV_USE_MONOTONIC
274# define EV_USE_MONOTONIC 0
275# endif
276# ifndef EV_USE_REALTIME
277# define EV_USE_REALTIME 0
278# endif
279#endif
280
245#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 283# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 284# else
249# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
250# endif 286# endif
251#endif 287#endif
… …
288 324
289#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
290# define EV_USE_PORT 0 326# define EV_USE_PORT 0
291#endif 327#endif
292 328
329#ifndef EV_USE_LINUXAIO
330# 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
403#if EV_USE_LINUXAIO
404# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
405#endif
406
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 407/* 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. */ 408/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 409#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 410# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 411# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 412# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 413# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 414# define EV_USE_MONOTONIC 1
351# else 415# else
… …
354# endif 418# endif
355#endif 419#endif
356 420
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 421/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 422
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 423#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 424# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 425# define EV_USE_MONOTONIC 0
368#endif 426#endif
369 427
… …
376# undef EV_USE_INOTIFY 434# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 435# define EV_USE_INOTIFY 0
378#endif 436#endif
379 437
380#if !EV_USE_NANOSLEEP 438#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 439/* hp-ux has it in sys/time.h, which we unconditionally include above */
440# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 441# include <sys/select.h>
383# endif 442# endif
384#endif 443#endif
385 444
445#if EV_USE_LINUXAIO
446# include <sys/syscall.h>
447# if !SYS_io_getevents
448# undef EV_USE_LINUXAIO
449# define EV_USE_LINUXAIO 0
450# endif
451#endif
452
386#if EV_USE_INOTIFY 453#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 454# include <sys/statfs.h>
389# include <sys/inotify.h> 455# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 456/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 457# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 458# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 459# define EV_USE_INOTIFY 0
394# endif 460# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 461#endif
400 462
401#if EV_USE_EVENTFD 463#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 464/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 465# include <stdint.h>
… …
443#else 505#else
444# define EV_FREQUENT_CHECK do { } while (0) 506# define EV_FREQUENT_CHECK do { } while (0)
445#endif 507#endif
446 508
447/* 509/*
448 * This is used to avoid floating point rounding problems. 510 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 511 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 512 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 513#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
514/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 515
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 516#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 517#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 518
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 519#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 520#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 521
522/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
523/* ECB.H BEGIN */
524/*
525 * libecb - http://software.schmorp.de/pkg/libecb
526 *
527 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
528 * Copyright (©) 2011 Emanuele Giaquinta
529 * All rights reserved.
530 *
531 * Redistribution and use in source and binary forms, with or without modifica-
532 * tion, are permitted provided that the following conditions are met:
533 *
534 * 1. Redistributions of source code must retain the above copyright notice,
535 * this list of conditions and the following disclaimer.
536 *
537 * 2. Redistributions in binary form must reproduce the above copyright
538 * notice, this list of conditions and the following disclaimer in the
539 * documentation and/or other materials provided with the distribution.
540 *
541 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
542 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
543 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
544 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
545 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
546 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
547 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
548 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
549 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
550 * OF THE POSSIBILITY OF SUCH DAMAGE.
551 *
552 * Alternatively, the contents of this file may be used under the terms of
553 * the GNU General Public License ("GPL") version 2 or any later version,
554 * in which case the provisions of the GPL are applicable instead of
555 * the above. If you wish to allow the use of your version of this file
556 * only under the terms of the GPL and not to allow others to use your
557 * version of this file under the BSD license, indicate your decision
558 * by deleting the provisions above and replace them with the notice
559 * and other provisions required by the GPL. If you do not delete the
560 * provisions above, a recipient may use your version of this file under
561 * either the BSD or the GPL.
562 */
563
564#ifndef ECB_H
565#define ECB_H
566
567/* 16 bits major, 16 bits minor */
568#define ECB_VERSION 0x00010005
569
570#ifdef _WIN32
571 typedef signed char int8_t;
572 typedef unsigned char uint8_t;
573 typedef signed short int16_t;
574 typedef unsigned short uint16_t;
575 typedef signed int int32_t;
576 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 577 #if __GNUC__
578 typedef signed long long int64_t;
579 typedef unsigned long long uint64_t;
580 #else /* _MSC_VER || __BORLANDC__ */
581 typedef signed __int64 int64_t;
582 typedef unsigned __int64 uint64_t;
583 #endif
584 #ifdef _WIN64
585 #define ECB_PTRSIZE 8
586 typedef uint64_t uintptr_t;
587 typedef int64_t intptr_t;
588 #else
589 #define ECB_PTRSIZE 4
590 typedef uint32_t uintptr_t;
591 typedef int32_t intptr_t;
592 #endif
593#else
594 #include <inttypes.h>
595 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
596 #define ECB_PTRSIZE 8
597 #else
598 #define ECB_PTRSIZE 4
599 #endif
600#endif
601
602#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
603#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
604
605/* work around x32 idiocy by defining proper macros */
606#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
607 #if _ILP32
608 #define ECB_AMD64_X32 1
609 #else
610 #define ECB_AMD64 1
611 #endif
612#endif
613
614/* many compilers define _GNUC_ to some versions but then only implement
615 * what their idiot authors think are the "more important" extensions,
616 * causing enormous grief in return for some better fake benchmark numbers.
617 * or so.
618 * we try to detect these and simply assume they are not gcc - if they have
619 * an issue with that they should have done it right in the first place.
620 */
621#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
622 #define ECB_GCC_VERSION(major,minor) 0
623#else
624 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
625#endif
626
627#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
628
629#if __clang__ && defined __has_builtin
630 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
631#else
632 #define ECB_CLANG_BUILTIN(x) 0
633#endif
634
635#if __clang__ && defined __has_extension
636 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
637#else
638 #define ECB_CLANG_EXTENSION(x) 0
639#endif
640
641#define ECB_CPP (__cplusplus+0)
642#define ECB_CPP11 (__cplusplus >= 201103L)
643#define ECB_CPP14 (__cplusplus >= 201402L)
644#define ECB_CPP17 (__cplusplus >= 201703L)
645
646#if ECB_CPP
647 #define ECB_C 0
648 #define ECB_STDC_VERSION 0
649#else
650 #define ECB_C 1
651 #define ECB_STDC_VERSION __STDC_VERSION__
652#endif
653
654#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
655#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
656#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
657
658#if ECB_CPP
659 #define ECB_EXTERN_C extern "C"
660 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
661 #define ECB_EXTERN_C_END }
662#else
663 #define ECB_EXTERN_C extern
664 #define ECB_EXTERN_C_BEG
665 #define ECB_EXTERN_C_END
666#endif
667
668/*****************************************************************************/
669
670/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
671/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
672
673#if ECB_NO_THREADS
674 #define ECB_NO_SMP 1
675#endif
676
677#if ECB_NO_SMP
678 #define ECB_MEMORY_FENCE do { } while (0)
679#endif
680
681/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
682#if __xlC__ && ECB_CPP
683 #include <builtins.h>
684#endif
685
686#if 1400 <= _MSC_VER
687 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
688#endif
689
690#ifndef ECB_MEMORY_FENCE
691 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
692 #if __i386 || __i386__
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
694 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
695 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
696 #elif ECB_GCC_AMD64
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
698 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
699 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
700 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
701 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
702 #elif defined __ARM_ARCH_2__ \
703 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
704 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
705 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
706 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
707 || defined __ARM_ARCH_5TEJ__
708 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
709 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
710 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
711 || defined __ARM_ARCH_6T2__
712 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
713 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
714 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
715 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
716 #elif __aarch64__
717 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
718 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
719 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
720 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
721 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
722 #elif defined __s390__ || defined __s390x__
723 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
724 #elif defined __mips__
725 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
726 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
727 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
728 #elif defined __alpha__
729 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
730 #elif defined __hppa__
731 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
732 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
733 #elif defined __ia64__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
735 #elif defined __m68k__
736 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
737 #elif defined __m88k__
738 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
739 #elif defined __sh__
740 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
741 #endif
742 #endif
743#endif
744
745#ifndef ECB_MEMORY_FENCE
746 #if ECB_GCC_VERSION(4,7)
747 /* see comment below (stdatomic.h) about the C11 memory model. */
748 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
749 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
750 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
751
752 #elif ECB_CLANG_EXTENSION(c_atomic)
753 /* see comment below (stdatomic.h) about the C11 memory model. */
754 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
755 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
756 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
757
758 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
759 #define ECB_MEMORY_FENCE __sync_synchronize ()
760 #elif _MSC_VER >= 1500 /* VC++ 2008 */
761 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
762 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
763 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
764 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
765 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
766 #elif _MSC_VER >= 1400 /* VC++ 2005 */
767 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
768 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
769 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
770 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
771 #elif defined _WIN32
772 #include <WinNT.h>
773 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
774 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
775 #include <mbarrier.h>
776 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
777 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
778 #define ECB_MEMORY_FENCE_RELEASE __machine_w_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 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
790 /* any fence other than seq_cst, which isn't very efficient for us. */
791 /* Why that is, we don't know - either the C11 memory model is quite useless */
792 /* for most usages, or gcc and clang have a bug */
793 /* I *currently* lean towards the latter, and inefficiently implement */
794 /* all three of ecb's fences as a seq_cst fence */
795 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
796 /* for all __atomic_thread_fence's except seq_cst */
797 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
798 #endif
799#endif
800
801#ifndef ECB_MEMORY_FENCE
802 #if !ECB_AVOID_PTHREADS
803 /*
804 * if you get undefined symbol references to pthread_mutex_lock,
805 * or failure to find pthread.h, then you should implement
806 * the ECB_MEMORY_FENCE operations for your cpu/compiler
807 * OR provide pthread.h and link against the posix thread library
808 * of your system.
809 */
810 #include <pthread.h>
811 #define ECB_NEEDS_PTHREADS 1
812 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
813
814 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
815 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
816 #endif
817#endif
818
819#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
820 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
821#endif
822
823#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
824 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
825#endif
826
827/*****************************************************************************/
828
829#if ECB_CPP
830 #define ecb_inline static inline
831#elif ECB_GCC_VERSION(2,5)
832 #define ecb_inline static __inline__
833#elif ECB_C99
834 #define ecb_inline static inline
835#else
836 #define ecb_inline static
837#endif
838
839#if ECB_GCC_VERSION(3,3)
840 #define ecb_restrict __restrict__
841#elif ECB_C99
842 #define ecb_restrict restrict
843#else
844 #define ecb_restrict
845#endif
846
847typedef int ecb_bool;
848
849#define ECB_CONCAT_(a, b) a ## b
850#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
851#define ECB_STRINGIFY_(a) # a
852#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
853#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
854
855#define ecb_function_ ecb_inline
856
857#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
858 #define ecb_attribute(attrlist) __attribute__ (attrlist)
859#else
860 #define ecb_attribute(attrlist)
861#endif
862
863#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
864 #define ecb_is_constant(expr) __builtin_constant_p (expr)
865#else
866 /* possible C11 impl for integral types
867 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
868 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
869
870 #define ecb_is_constant(expr) 0
871#endif
872
873#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 874 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 875#else
467# define expect(expr,value) (expr) 876 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 877#endif
472#endif
473 878
879#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
880 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
881#else
882 #define ecb_prefetch(addr,rw,locality)
883#endif
884
885/* no emulation for ecb_decltype */
886#if ECB_CPP11
887 // older implementations might have problems with decltype(x)::type, work around it
888 template<class T> struct ecb_decltype_t { typedef T type; };
889 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
890#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
891 #define ecb_decltype(x) __typeof__ (x)
892#endif
893
894#if _MSC_VER >= 1300
895 #define ecb_deprecated __declspec (deprecated)
896#else
897 #define ecb_deprecated ecb_attribute ((__deprecated__))
898#endif
899
900#if _MSC_VER >= 1500
901 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
902#elif ECB_GCC_VERSION(4,5)
903 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
904#else
905 #define ecb_deprecated_message(msg) ecb_deprecated
906#endif
907
908#if _MSC_VER >= 1400
909 #define ecb_noinline __declspec (noinline)
910#else
911 #define ecb_noinline ecb_attribute ((__noinline__))
912#endif
913
914#define ecb_unused ecb_attribute ((__unused__))
915#define ecb_const ecb_attribute ((__const__))
916#define ecb_pure ecb_attribute ((__pure__))
917
918#if ECB_C11 || __IBMC_NORETURN
919 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
920 #define ecb_noreturn _Noreturn
921#elif ECB_CPP11
922 #define ecb_noreturn [[noreturn]]
923#elif _MSC_VER >= 1200
924 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
925 #define ecb_noreturn __declspec (noreturn)
926#else
927 #define ecb_noreturn ecb_attribute ((__noreturn__))
928#endif
929
930#if ECB_GCC_VERSION(4,3)
931 #define ecb_artificial ecb_attribute ((__artificial__))
932 #define ecb_hot ecb_attribute ((__hot__))
933 #define ecb_cold ecb_attribute ((__cold__))
934#else
935 #define ecb_artificial
936 #define ecb_hot
937 #define ecb_cold
938#endif
939
940/* put around conditional expressions if you are very sure that the */
941/* expression is mostly true or mostly false. note that these return */
942/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 943#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 944#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
945/* for compatibility to the rest of the world */
946#define ecb_likely(expr) ecb_expect_true (expr)
947#define ecb_unlikely(expr) ecb_expect_false (expr)
948
949/* count trailing zero bits and count # of one bits */
950#if ECB_GCC_VERSION(3,4) \
951 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
952 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
953 && ECB_CLANG_BUILTIN(__builtin_popcount))
954 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
955 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
956 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
957 #define ecb_ctz32(x) __builtin_ctz (x)
958 #define ecb_ctz64(x) __builtin_ctzll (x)
959 #define ecb_popcount32(x) __builtin_popcount (x)
960 /* no popcountll */
961#else
962 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
963 ecb_function_ ecb_const int
964 ecb_ctz32 (uint32_t x)
965 {
966#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
967 unsigned long r;
968 _BitScanForward (&r, x);
969 return (int)r;
970#else
971 int r = 0;
972
973 x &= ~x + 1; /* this isolates the lowest bit */
974
975#if ECB_branchless_on_i386
976 r += !!(x & 0xaaaaaaaa) << 0;
977 r += !!(x & 0xcccccccc) << 1;
978 r += !!(x & 0xf0f0f0f0) << 2;
979 r += !!(x & 0xff00ff00) << 3;
980 r += !!(x & 0xffff0000) << 4;
981#else
982 if (x & 0xaaaaaaaa) r += 1;
983 if (x & 0xcccccccc) r += 2;
984 if (x & 0xf0f0f0f0) r += 4;
985 if (x & 0xff00ff00) r += 8;
986 if (x & 0xffff0000) r += 16;
987#endif
988
989 return r;
990#endif
991 }
992
993 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
994 ecb_function_ ecb_const int
995 ecb_ctz64 (uint64_t x)
996 {
997#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
998 unsigned long r;
999 _BitScanForward64 (&r, x);
1000 return (int)r;
1001#else
1002 int shift = x & 0xffffffff ? 0 : 32;
1003 return ecb_ctz32 (x >> shift) + shift;
1004#endif
1005 }
1006
1007 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1008 ecb_function_ ecb_const int
1009 ecb_popcount32 (uint32_t x)
1010 {
1011 x -= (x >> 1) & 0x55555555;
1012 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1013 x = ((x >> 4) + x) & 0x0f0f0f0f;
1014 x *= 0x01010101;
1015
1016 return x >> 24;
1017 }
1018
1019 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1020 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1021 {
1022#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1023 unsigned long r;
1024 _BitScanReverse (&r, x);
1025 return (int)r;
1026#else
1027 int r = 0;
1028
1029 if (x >> 16) { x >>= 16; r += 16; }
1030 if (x >> 8) { x >>= 8; r += 8; }
1031 if (x >> 4) { x >>= 4; r += 4; }
1032 if (x >> 2) { x >>= 2; r += 2; }
1033 if (x >> 1) { r += 1; }
1034
1035 return r;
1036#endif
1037 }
1038
1039 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1040 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1041 {
1042#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1043 unsigned long r;
1044 _BitScanReverse64 (&r, x);
1045 return (int)r;
1046#else
1047 int r = 0;
1048
1049 if (x >> 32) { x >>= 32; r += 32; }
1050
1051 return r + ecb_ld32 (x);
1052#endif
1053 }
1054#endif
1055
1056ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1057ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1058ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1059ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1060
1061ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1062ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1063{
1064 return ( (x * 0x0802U & 0x22110U)
1065 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1066}
1067
1068ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1069ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1070{
1071 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1072 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1073 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1074 x = ( x >> 8 ) | ( x << 8);
1075
1076 return x;
1077}
1078
1079ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1080ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1081{
1082 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1083 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1084 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1085 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1086 x = ( x >> 16 ) | ( x << 16);
1087
1088 return x;
1089}
1090
1091/* popcount64 is only available on 64 bit cpus as gcc builtin */
1092/* so for this version we are lazy */
1093ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1094ecb_function_ ecb_const int
1095ecb_popcount64 (uint64_t x)
1096{
1097 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1098}
1099
1100ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1101ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1102ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1103ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1104ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1105ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1106ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1107ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1108
1109ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1110ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1111ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1112ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1113ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1114ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1115ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1116ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1117
1118#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1119 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1120 #define ecb_bswap16(x) __builtin_bswap16 (x)
1121 #else
1122 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1123 #endif
1124 #define ecb_bswap32(x) __builtin_bswap32 (x)
1125 #define ecb_bswap64(x) __builtin_bswap64 (x)
1126#elif _MSC_VER
1127 #include <stdlib.h>
1128 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1129 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1130 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1131#else
1132 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1133 ecb_function_ ecb_const uint16_t
1134 ecb_bswap16 (uint16_t x)
1135 {
1136 return ecb_rotl16 (x, 8);
1137 }
1138
1139 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1140 ecb_function_ ecb_const uint32_t
1141 ecb_bswap32 (uint32_t x)
1142 {
1143 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1144 }
1145
1146 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1147 ecb_function_ ecb_const uint64_t
1148 ecb_bswap64 (uint64_t x)
1149 {
1150 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1151 }
1152#endif
1153
1154#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1155 #define ecb_unreachable() __builtin_unreachable ()
1156#else
1157 /* this seems to work fine, but gcc always emits a warning for it :/ */
1158 ecb_inline ecb_noreturn void ecb_unreachable (void);
1159 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1160#endif
1161
1162/* try to tell the compiler that some condition is definitely true */
1163#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1164
1165ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1166ecb_inline ecb_const uint32_t
1167ecb_byteorder_helper (void)
1168{
1169 /* the union code still generates code under pressure in gcc, */
1170 /* but less than using pointers, and always seems to */
1171 /* successfully return a constant. */
1172 /* the reason why we have this horrible preprocessor mess */
1173 /* is to avoid it in all cases, at least on common architectures */
1174 /* or when using a recent enough gcc version (>= 4.6) */
1175#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1176 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1177 #define ECB_LITTLE_ENDIAN 1
1178 return 0x44332211;
1179#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1180 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1181 #define ECB_BIG_ENDIAN 1
1182 return 0x11223344;
1183#else
1184 union
1185 {
1186 uint8_t c[4];
1187 uint32_t u;
1188 } u = { 0x11, 0x22, 0x33, 0x44 };
1189 return u.u;
1190#endif
1191}
1192
1193ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1194ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1195ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1196ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1197
1198#if ECB_GCC_VERSION(3,0) || ECB_C99
1199 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1200#else
1201 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1202#endif
1203
1204#if ECB_CPP
1205 template<typename T>
1206 static inline T ecb_div_rd (T val, T div)
1207 {
1208 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1209 }
1210 template<typename T>
1211 static inline T ecb_div_ru (T val, T div)
1212 {
1213 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1214 }
1215#else
1216 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1217 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1218#endif
1219
1220#if ecb_cplusplus_does_not_suck
1221 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1222 template<typename T, int N>
1223 static inline int ecb_array_length (const T (&arr)[N])
1224 {
1225 return N;
1226 }
1227#else
1228 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1229#endif
1230
1231ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1232ecb_function_ ecb_const uint32_t
1233ecb_binary16_to_binary32 (uint32_t x)
1234{
1235 unsigned int s = (x & 0x8000) << (31 - 15);
1236 int e = (x >> 10) & 0x001f;
1237 unsigned int m = x & 0x03ff;
1238
1239 if (ecb_expect_false (e == 31))
1240 /* infinity or NaN */
1241 e = 255 - (127 - 15);
1242 else if (ecb_expect_false (!e))
1243 {
1244 if (ecb_expect_true (!m))
1245 /* zero, handled by code below by forcing e to 0 */
1246 e = 0 - (127 - 15);
1247 else
1248 {
1249 /* subnormal, renormalise */
1250 unsigned int s = 10 - ecb_ld32 (m);
1251
1252 m = (m << s) & 0x3ff; /* mask implicit bit */
1253 e -= s - 1;
1254 }
1255 }
1256
1257 /* e and m now are normalised, or zero, (or inf or nan) */
1258 e += 127 - 15;
1259
1260 return s | (e << 23) | (m << (23 - 10));
1261}
1262
1263ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1264ecb_function_ ecb_const uint16_t
1265ecb_binary32_to_binary16 (uint32_t x)
1266{
1267 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1268 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1269 unsigned int m = x & 0x007fffff;
1270
1271 x &= 0x7fffffff;
1272
1273 /* if it's within range of binary16 normals, use fast path */
1274 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1275 {
1276 /* mantissa round-to-even */
1277 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1278
1279 /* handle overflow */
1280 if (ecb_expect_false (m >= 0x00800000))
1281 {
1282 m >>= 1;
1283 e += 1;
1284 }
1285
1286 return s | (e << 10) | (m >> (23 - 10));
1287 }
1288
1289 /* handle large numbers and infinity */
1290 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1291 return s | 0x7c00;
1292
1293 /* handle zero, subnormals and small numbers */
1294 if (ecb_expect_true (x < 0x38800000))
1295 {
1296 /* zero */
1297 if (ecb_expect_true (!x))
1298 return s;
1299
1300 /* handle subnormals */
1301
1302 /* too small, will be zero */
1303 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1304 return s;
1305
1306 m |= 0x00800000; /* make implicit bit explicit */
1307
1308 /* very tricky - we need to round to the nearest e (+10) bit value */
1309 {
1310 unsigned int bits = 14 - e;
1311 unsigned int half = (1 << (bits - 1)) - 1;
1312 unsigned int even = (m >> bits) & 1;
1313
1314 /* if this overflows, we will end up with a normalised number */
1315 m = (m + half + even) >> bits;
1316 }
1317
1318 return s | m;
1319 }
1320
1321 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1322 m >>= 13;
1323
1324 return s | 0x7c00 | m | !m;
1325}
1326
1327/*******************************************************************************/
1328/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1329
1330/* basically, everything uses "ieee pure-endian" floating point numbers */
1331/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1332#if 0 \
1333 || __i386 || __i386__ \
1334 || ECB_GCC_AMD64 \
1335 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1336 || defined __s390__ || defined __s390x__ \
1337 || defined __mips__ \
1338 || defined __alpha__ \
1339 || defined __hppa__ \
1340 || defined __ia64__ \
1341 || defined __m68k__ \
1342 || defined __m88k__ \
1343 || defined __sh__ \
1344 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1345 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1346 || defined __aarch64__
1347 #define ECB_STDFP 1
1348 #include <string.h> /* for memcpy */
1349#else
1350 #define ECB_STDFP 0
1351#endif
1352
1353#ifndef ECB_NO_LIBM
1354
1355 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1356
1357 /* only the oldest of old doesn't have this one. solaris. */
1358 #ifdef INFINITY
1359 #define ECB_INFINITY INFINITY
1360 #else
1361 #define ECB_INFINITY HUGE_VAL
1362 #endif
1363
1364 #ifdef NAN
1365 #define ECB_NAN NAN
1366 #else
1367 #define ECB_NAN ECB_INFINITY
1368 #endif
1369
1370 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1371 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1372 #define ecb_frexpf(x,e) frexpf ((x), (e))
1373 #else
1374 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1375 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1376 #endif
1377
1378 /* convert a float to ieee single/binary32 */
1379 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1380 ecb_function_ ecb_const uint32_t
1381 ecb_float_to_binary32 (float x)
1382 {
1383 uint32_t r;
1384
1385 #if ECB_STDFP
1386 memcpy (&r, &x, 4);
1387 #else
1388 /* slow emulation, works for anything but -0 */
1389 uint32_t m;
1390 int e;
1391
1392 if (x == 0e0f ) return 0x00000000U;
1393 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1394 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1395 if (x != x ) return 0x7fbfffffU;
1396
1397 m = ecb_frexpf (x, &e) * 0x1000000U;
1398
1399 r = m & 0x80000000U;
1400
1401 if (r)
1402 m = -m;
1403
1404 if (e <= -126)
1405 {
1406 m &= 0xffffffU;
1407 m >>= (-125 - e);
1408 e = -126;
1409 }
1410
1411 r |= (e + 126) << 23;
1412 r |= m & 0x7fffffU;
1413 #endif
1414
1415 return r;
1416 }
1417
1418 /* converts an ieee single/binary32 to a float */
1419 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1420 ecb_function_ ecb_const float
1421 ecb_binary32_to_float (uint32_t x)
1422 {
1423 float r;
1424
1425 #if ECB_STDFP
1426 memcpy (&r, &x, 4);
1427 #else
1428 /* emulation, only works for normals and subnormals and +0 */
1429 int neg = x >> 31;
1430 int e = (x >> 23) & 0xffU;
1431
1432 x &= 0x7fffffU;
1433
1434 if (e)
1435 x |= 0x800000U;
1436 else
1437 e = 1;
1438
1439 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1440 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1441
1442 r = neg ? -r : r;
1443 #endif
1444
1445 return r;
1446 }
1447
1448 /* convert a double to ieee double/binary64 */
1449 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1450 ecb_function_ ecb_const uint64_t
1451 ecb_double_to_binary64 (double x)
1452 {
1453 uint64_t r;
1454
1455 #if ECB_STDFP
1456 memcpy (&r, &x, 8);
1457 #else
1458 /* slow emulation, works for anything but -0 */
1459 uint64_t m;
1460 int e;
1461
1462 if (x == 0e0 ) return 0x0000000000000000U;
1463 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1464 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1465 if (x != x ) return 0X7ff7ffffffffffffU;
1466
1467 m = frexp (x, &e) * 0x20000000000000U;
1468
1469 r = m & 0x8000000000000000;;
1470
1471 if (r)
1472 m = -m;
1473
1474 if (e <= -1022)
1475 {
1476 m &= 0x1fffffffffffffU;
1477 m >>= (-1021 - e);
1478 e = -1022;
1479 }
1480
1481 r |= ((uint64_t)(e + 1022)) << 52;
1482 r |= m & 0xfffffffffffffU;
1483 #endif
1484
1485 return r;
1486 }
1487
1488 /* converts an ieee double/binary64 to a double */
1489 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1490 ecb_function_ ecb_const double
1491 ecb_binary64_to_double (uint64_t x)
1492 {
1493 double r;
1494
1495 #if ECB_STDFP
1496 memcpy (&r, &x, 8);
1497 #else
1498 /* emulation, only works for normals and subnormals and +0 */
1499 int neg = x >> 63;
1500 int e = (x >> 52) & 0x7ffU;
1501
1502 x &= 0xfffffffffffffU;
1503
1504 if (e)
1505 x |= 0x10000000000000U;
1506 else
1507 e = 1;
1508
1509 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1510 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1511
1512 r = neg ? -r : r;
1513 #endif
1514
1515 return r;
1516 }
1517
1518 /* convert a float to ieee half/binary16 */
1519 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1520 ecb_function_ ecb_const uint16_t
1521 ecb_float_to_binary16 (float x)
1522 {
1523 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1524 }
1525
1526 /* convert an ieee half/binary16 to float */
1527 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1528 ecb_function_ ecb_const float
1529 ecb_binary16_to_float (uint16_t x)
1530 {
1531 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1532 }
1533
1534#endif
1535
1536#endif
1537
1538/* ECB.H END */
1539
1540#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1541/* if your architecture doesn't need memory fences, e.g. because it is
1542 * single-cpu/core, or if you use libev in a project that doesn't use libev
1543 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1544 * libev, in which cases the memory fences become nops.
1545 * alternatively, you can remove this #error and link against libpthread,
1546 * which will then provide the memory fences.
1547 */
1548# error "memory fences not defined for your architecture, please report"
1549#endif
1550
1551#ifndef ECB_MEMORY_FENCE
1552# define ECB_MEMORY_FENCE do { } while (0)
1553# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1554# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1555#endif
1556
1557#define expect_false(cond) ecb_expect_false (cond)
1558#define expect_true(cond) ecb_expect_true (cond)
1559#define noinline ecb_noinline
1560
476#define inline_size static inline 1561#define inline_size ecb_inline
477 1562
478#if EV_FEATURE_CODE 1563#if EV_FEATURE_CODE
479# define inline_speed static inline 1564# define inline_speed ecb_inline
480#else 1565#else
481# define inline_speed static noinline 1566# define inline_speed noinline static
482#endif 1567#endif
483 1568
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1569#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1570
486#if EV_MINPRI == EV_MAXPRI 1571#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1572# define ABSPRI(w) (((W)w), 0)
488#else 1573#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1574# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1575#endif
491 1576
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1577#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1578
495typedef ev_watcher *W; 1579typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1580typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1581typedef ev_watcher_time *WT;
498 1582
… …
523# include "ev_win32.c" 1607# include "ev_win32.c"
524#endif 1608#endif
525 1609
526/*****************************************************************************/ 1610/*****************************************************************************/
527 1611
1612/* define a suitable floor function (only used by periodics atm) */
1613
1614#if EV_USE_FLOOR
1615# include <math.h>
1616# define ev_floor(v) floor (v)
1617#else
1618
1619#include <float.h>
1620
1621/* a floor() replacement function, should be independent of ev_tstamp type */
1622noinline
1623static ev_tstamp
1624ev_floor (ev_tstamp v)
1625{
1626 /* the choice of shift factor is not terribly important */
1627#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1628 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1629#else
1630 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1631#endif
1632
1633 /* argument too large for an unsigned long? */
1634 if (expect_false (v >= shift))
1635 {
1636 ev_tstamp f;
1637
1638 if (v == v - 1.)
1639 return v; /* very large number */
1640
1641 f = shift * ev_floor (v * (1. / shift));
1642 return f + ev_floor (v - f);
1643 }
1644
1645 /* special treatment for negative args? */
1646 if (expect_false (v < 0.))
1647 {
1648 ev_tstamp f = -ev_floor (-v);
1649
1650 return f - (f == v ? 0 : 1);
1651 }
1652
1653 /* fits into an unsigned long */
1654 return (unsigned long)v;
1655}
1656
1657#endif
1658
1659/*****************************************************************************/
1660
1661#ifdef __linux
1662# include <sys/utsname.h>
1663#endif
1664
1665noinline ecb_cold
1666static unsigned int
1667ev_linux_version (void)
1668{
1669#ifdef __linux
1670 unsigned int v = 0;
1671 struct utsname buf;
1672 int i;
1673 char *p = buf.release;
1674
1675 if (uname (&buf))
1676 return 0;
1677
1678 for (i = 3+1; --i; )
1679 {
1680 unsigned int c = 0;
1681
1682 for (;;)
1683 {
1684 if (*p >= '0' && *p <= '9')
1685 c = c * 10 + *p++ - '0';
1686 else
1687 {
1688 p += *p == '.';
1689 break;
1690 }
1691 }
1692
1693 v = (v << 8) | c;
1694 }
1695
1696 return v;
1697#else
1698 return 0;
1699#endif
1700}
1701
1702/*****************************************************************************/
1703
528#if EV_AVOID_STDIO 1704#if EV_AVOID_STDIO
529static void noinline 1705noinline ecb_cold
1706static void
530ev_printerr (const char *msg) 1707ev_printerr (const char *msg)
531{ 1708{
532 write (STDERR_FILENO, msg, strlen (msg)); 1709 write (STDERR_FILENO, msg, strlen (msg));
533} 1710}
534#endif 1711#endif
535 1712
536static void (*syserr_cb)(const char *msg); 1713static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
537 1714
1715ecb_cold
538void 1716void
539ev_set_syserr_cb (void (*cb)(const char *msg)) 1717ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
540{ 1718{
541 syserr_cb = cb; 1719 syserr_cb = cb;
542} 1720}
543 1721
544static void noinline 1722noinline ecb_cold
1723static void
545ev_syserr (const char *msg) 1724ev_syserr (const char *msg)
546{ 1725{
547 if (!msg) 1726 if (!msg)
548 msg = "(libev) system error"; 1727 msg = "(libev) system error";
549 1728
550 if (syserr_cb) 1729 if (syserr_cb)
551 syserr_cb (msg); 1730 syserr_cb (msg);
552 else 1731 else
553 { 1732 {
554#if EV_AVOID_STDIO 1733#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 1734 ev_printerr (msg);
558 ev_printerr (": "); 1735 ev_printerr (": ");
559 ev_printerr (err); 1736 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 1737 ev_printerr ("\n");
561#else 1738#else
562 perror (msg); 1739 perror (msg);
563#endif 1740#endif
564 abort (); 1741 abort ();
565 } 1742 }
566} 1743}
567 1744
568static void * 1745static void *
569ev_realloc_emul (void *ptr, long size) 1746ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
570{ 1747{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly 1748 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and 1749 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here. 1750 * the single unix specification, so work around them here.
1751 * recently, also (at least) fedora and debian started breaking it,
1752 * despite documenting it otherwise.
577 */ 1753 */
578 1754
579 if (size) 1755 if (size)
580 return realloc (ptr, size); 1756 return realloc (ptr, size);
581 1757
582 free (ptr); 1758 free (ptr);
583 return 0; 1759 return 0;
584#endif
585} 1760}
586 1761
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1762static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
588 1763
1764ecb_cold
589void 1765void
590ev_set_allocator (void *(*cb)(void *ptr, long size)) 1766ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
591{ 1767{
592 alloc = cb; 1768 alloc = cb;
593} 1769}
594 1770
595inline_speed void * 1771inline_speed void *
… …
598 ptr = alloc (ptr, size); 1774 ptr = alloc (ptr, size);
599 1775
600 if (!ptr && size) 1776 if (!ptr && size)
601 { 1777 {
602#if EV_AVOID_STDIO 1778#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1779 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 1780#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1781 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 1782#endif
607 abort (); 1783 abort ();
608 } 1784 }
609 1785
610 return ptr; 1786 return ptr;
… …
622typedef struct 1798typedef struct
623{ 1799{
624 WL head; 1800 WL head;
625 unsigned char events; /* the events watched for */ 1801 unsigned char events; /* the events watched for */
626 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1802 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1803 unsigned char emask; /* some backends store the actual kernel mask in here */
628 unsigned char unused; 1804 unsigned char unused;
629#if EV_USE_EPOLL 1805#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 1806 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 1807#endif
632#if EV_SELECT_IS_WINSOCKET 1808#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 1809 SOCKET handle;
1810#endif
1811#if EV_USE_IOCP
1812 OVERLAPPED or, ow;
634#endif 1813#endif
635} ANFD; 1814} ANFD;
636 1815
637/* stores the pending event set for a given watcher */ 1816/* stores the pending event set for a given watcher */
638typedef struct 1817typedef struct
… …
680 #undef VAR 1859 #undef VAR
681 }; 1860 };
682 #include "ev_wrap.h" 1861 #include "ev_wrap.h"
683 1862
684 static struct ev_loop default_loop_struct; 1863 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr; 1864 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
686 1865
687#else 1866#else
688 1867
689 ev_tstamp ev_rt_now; 1868 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
690 #define VAR(name,decl) static decl; 1869 #define VAR(name,decl) static decl;
691 #include "ev_vars.h" 1870 #include "ev_vars.h"
692 #undef VAR 1871 #undef VAR
693 1872
694 static int ev_default_loop_ptr; 1873 static int ev_default_loop_ptr;
… …
709 1888
710/*****************************************************************************/ 1889/*****************************************************************************/
711 1890
712#ifndef EV_HAVE_EV_TIME 1891#ifndef EV_HAVE_EV_TIME
713ev_tstamp 1892ev_tstamp
714ev_time (void) 1893ev_time (void) EV_NOEXCEPT
715{ 1894{
716#if EV_USE_REALTIME 1895#if EV_USE_REALTIME
717 if (expect_true (have_realtime)) 1896 if (expect_true (have_realtime))
718 { 1897 {
719 struct timespec ts; 1898 struct timespec ts;
… …
743 return ev_time (); 1922 return ev_time ();
744} 1923}
745 1924
746#if EV_MULTIPLICITY 1925#if EV_MULTIPLICITY
747ev_tstamp 1926ev_tstamp
748ev_now (EV_P) 1927ev_now (EV_P) EV_NOEXCEPT
749{ 1928{
750 return ev_rt_now; 1929 return ev_rt_now;
751} 1930}
752#endif 1931#endif
753 1932
754void 1933void
755ev_sleep (ev_tstamp delay) 1934ev_sleep (ev_tstamp delay) EV_NOEXCEPT
756{ 1935{
757 if (delay > 0.) 1936 if (delay > 0.)
758 { 1937 {
759#if EV_USE_NANOSLEEP 1938#if EV_USE_NANOSLEEP
760 struct timespec ts; 1939 struct timespec ts;
761 1940
762 EV_TS_SET (ts, delay); 1941 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0); 1942 nanosleep (&ts, 0);
764#elif defined(_WIN32) 1943#elif defined _WIN32
1944 /* maybe this should round up, as ms is very low resolution */
1945 /* compared to select (µs) or nanosleep (ns) */
765 Sleep ((unsigned long)(delay * 1e3)); 1946 Sleep ((unsigned long)(delay * 1e3));
766#else 1947#else
767 struct timeval tv; 1948 struct timeval tv;
768 1949
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1950 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
788 1969
789 do 1970 do
790 ncur <<= 1; 1971 ncur <<= 1;
791 while (cnt > ncur); 1972 while (cnt > ncur);
792 1973
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1974 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1975 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 { 1976 {
796 ncur *= elem; 1977 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1978 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4; 1979 ncur = ncur - sizeof (void *) * 4;
… …
800 } 1981 }
801 1982
802 return ncur; 1983 return ncur;
803} 1984}
804 1985
805static noinline void * 1986noinline ecb_cold
1987static void *
806array_realloc (int elem, void *base, int *cur, int cnt) 1988array_realloc (int elem, void *base, int *cur, int cnt)
807{ 1989{
808 *cur = array_nextsize (elem, *cur, cnt); 1990 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur); 1991 return ev_realloc (base, elem * *cur);
810} 1992}
811 1993
1994#define array_needsize_noinit(base,count)
1995
812#define array_init_zero(base,count) \ 1996#define array_needsize_zerofill(base,count) \
813 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1997 memset ((void *)(base), 0, sizeof (*(base)) * (count))
814 1998
815#define array_needsize(type,base,cur,cnt,init) \ 1999#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \ 2000 if (expect_false ((cnt) > (cur))) \
817 { \ 2001 { \
818 int ocur_ = (cur); \ 2002 ecb_unused int ocur_ = (cur); \
819 (base) = (type *)array_realloc \ 2003 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \ 2004 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \ 2005 init ((base) + (ocur_), (cur) - ocur_); \
822 } 2006 }
823 2007
… …
835 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2019 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
836 2020
837/*****************************************************************************/ 2021/*****************************************************************************/
838 2022
839/* dummy callback for pending events */ 2023/* dummy callback for pending events */
840static void noinline 2024noinline
2025static void
841pendingcb (EV_P_ ev_prepare *w, int revents) 2026pendingcb (EV_P_ ev_prepare *w, int revents)
842{ 2027{
843} 2028}
844 2029
845void noinline 2030noinline
2031void
846ev_feed_event (EV_P_ void *w, int revents) 2032ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
847{ 2033{
848 W w_ = (W)w; 2034 W w_ = (W)w;
849 int pri = ABSPRI (w_); 2035 int pri = ABSPRI (w_);
850 2036
851 if (expect_false (w_->pending)) 2037 if (expect_false (w_->pending))
852 pendings [pri][w_->pending - 1].events |= revents; 2038 pendings [pri][w_->pending - 1].events |= revents;
853 else 2039 else
854 { 2040 {
855 w_->pending = ++pendingcnt [pri]; 2041 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2042 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
857 pendings [pri][w_->pending - 1].w = w_; 2043 pendings [pri][w_->pending - 1].w = w_;
858 pendings [pri][w_->pending - 1].events = revents; 2044 pendings [pri][w_->pending - 1].events = revents;
859 } 2045 }
2046
2047 pendingpri = NUMPRI - 1;
860} 2048}
861 2049
862inline_speed void 2050inline_speed void
863feed_reverse (EV_P_ W w) 2051feed_reverse (EV_P_ W w)
864{ 2052{
865 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2053 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
866 rfeeds [rfeedcnt++] = w; 2054 rfeeds [rfeedcnt++] = w;
867} 2055}
868 2056
869inline_size void 2057inline_size void
870feed_reverse_done (EV_P_ int revents) 2058feed_reverse_done (EV_P_ int revents)
… …
910 if (expect_true (!anfd->reify)) 2098 if (expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents); 2099 fd_event_nocheck (EV_A_ fd, revents);
912} 2100}
913 2101
914void 2102void
915ev_feed_fd_event (EV_P_ int fd, int revents) 2103ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
916{ 2104{
917 if (fd >= 0 && fd < anfdmax) 2105 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents); 2106 fd_event_nocheck (EV_A_ fd, revents);
919} 2107}
920 2108
… …
923inline_size void 2111inline_size void
924fd_reify (EV_P) 2112fd_reify (EV_P)
925{ 2113{
926 int i; 2114 int i;
927 2115
2116#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2117 for (i = 0; i < fdchangecnt; ++i)
2118 {
2119 int fd = fdchanges [i];
2120 ANFD *anfd = anfds + fd;
2121
2122 if (anfd->reify & EV__IOFDSET && anfd->head)
2123 {
2124 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2125
2126 if (handle != anfd->handle)
2127 {
2128 unsigned long arg;
2129
2130 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2131
2132 /* handle changed, but fd didn't - we need to do it in two steps */
2133 backend_modify (EV_A_ fd, anfd->events, 0);
2134 anfd->events = 0;
2135 anfd->handle = handle;
2136 }
2137 }
2138 }
2139#endif
2140
928 for (i = 0; i < fdchangecnt; ++i) 2141 for (i = 0; i < fdchangecnt; ++i)
929 { 2142 {
930 int fd = fdchanges [i]; 2143 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 2144 ANFD *anfd = anfds + fd;
932 ev_io *w; 2145 ev_io *w;
… …
934 unsigned char o_events = anfd->events; 2147 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 2148 unsigned char o_reify = anfd->reify;
936 2149
937 anfd->reify = 0; 2150 anfd->reify = 0;
938 2151
939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2152 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 2153 {
950 anfd->events = 0; 2154 anfd->events = 0;
951 2155
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2156 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
962 2166
963 fdchangecnt = 0; 2167 fdchangecnt = 0;
964} 2168}
965 2169
966/* something about the given fd changed */ 2170/* something about the given fd changed */
967inline_size void 2171inline_size
2172void
968fd_change (EV_P_ int fd, int flags) 2173fd_change (EV_P_ int fd, int flags)
969{ 2174{
970 unsigned char reify = anfds [fd].reify; 2175 unsigned char reify = anfds [fd].reify;
971 anfds [fd].reify |= flags; 2176 anfds [fd].reify |= flags;
972 2177
973 if (expect_true (!reify)) 2178 if (expect_true (!reify))
974 { 2179 {
975 ++fdchangecnt; 2180 ++fdchangecnt;
976 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2181 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
977 fdchanges [fdchangecnt - 1] = fd; 2182 fdchanges [fdchangecnt - 1] = fd;
978 } 2183 }
979} 2184}
980 2185
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2186/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void 2187inline_speed ecb_cold void
983fd_kill (EV_P_ int fd) 2188fd_kill (EV_P_ int fd)
984{ 2189{
985 ev_io *w; 2190 ev_io *w;
986 2191
987 while ((w = (ev_io *)anfds [fd].head)) 2192 while ((w = (ev_io *)anfds [fd].head))
… …
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2195 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 } 2196 }
992} 2197}
993 2198
994/* check whether the given fd is actually valid, for error recovery */ 2199/* check whether the given fd is actually valid, for error recovery */
995inline_size int 2200inline_size ecb_cold int
996fd_valid (int fd) 2201fd_valid (int fd)
997{ 2202{
998#ifdef _WIN32 2203#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2204 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else 2205#else
1001 return fcntl (fd, F_GETFD) != -1; 2206 return fcntl (fd, F_GETFD) != -1;
1002#endif 2207#endif
1003} 2208}
1004 2209
1005/* called on EBADF to verify fds */ 2210/* called on EBADF to verify fds */
1006static void noinline 2211noinline ecb_cold
2212static void
1007fd_ebadf (EV_P) 2213fd_ebadf (EV_P)
1008{ 2214{
1009 int fd; 2215 int fd;
1010 2216
1011 for (fd = 0; fd < anfdmax; ++fd) 2217 for (fd = 0; fd < anfdmax; ++fd)
… …
1013 if (!fd_valid (fd) && errno == EBADF) 2219 if (!fd_valid (fd) && errno == EBADF)
1014 fd_kill (EV_A_ fd); 2220 fd_kill (EV_A_ fd);
1015} 2221}
1016 2222
1017/* called on ENOMEM in select/poll to kill some fds and retry */ 2223/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline 2224noinline ecb_cold
2225static void
1019fd_enomem (EV_P) 2226fd_enomem (EV_P)
1020{ 2227{
1021 int fd; 2228 int fd;
1022 2229
1023 for (fd = anfdmax; fd--; ) 2230 for (fd = anfdmax; fd--; )
… …
1027 break; 2234 break;
1028 } 2235 }
1029} 2236}
1030 2237
1031/* usually called after fork if backend needs to re-arm all fds from scratch */ 2238/* usually called after fork if backend needs to re-arm all fds from scratch */
1032static void noinline 2239noinline
2240static void
1033fd_rearm_all (EV_P) 2241fd_rearm_all (EV_P)
1034{ 2242{
1035 int fd; 2243 int fd;
1036 2244
1037 for (fd = 0; fd < anfdmax; ++fd) 2245 for (fd = 0; fd < anfdmax; ++fd)
… …
1218 2426
1219/*****************************************************************************/ 2427/*****************************************************************************/
1220 2428
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2429#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222 2430
1223static void noinline 2431noinline ecb_cold
2432static void
1224evpipe_init (EV_P) 2433evpipe_init (EV_P)
1225{ 2434{
1226 if (!ev_is_active (&pipe_w)) 2435 if (!ev_is_active (&pipe_w))
1227 { 2436 {
2437 int fds [2];
2438
1228# if EV_USE_EVENTFD 2439# if EV_USE_EVENTFD
2440 fds [0] = -1;
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2441 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL) 2442 if (fds [1] < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0); 2443 fds [1] = eventfd (0, 0);
1232 2444
1233 if (evfd >= 0) 2445 if (fds [1] < 0)
2446# endif
1234 { 2447 {
2448 while (pipe (fds))
2449 ev_syserr ("(libev) error creating signal/async pipe");
2450
2451 fd_intern (fds [0]);
2452 }
2453
1235 evpipe [0] = -1; 2454 evpipe [0] = fds [0];
1236 fd_intern (evfd); /* doing it twice doesn't hurt */ 2455
1237 ev_io_set (&pipe_w, evfd, EV_READ); 2456 if (evpipe [1] < 0)
2457 evpipe [1] = fds [1]; /* first call, set write fd */
2458 else
2459 {
2460 /* on subsequent calls, do not change evpipe [1] */
2461 /* so that evpipe_write can always rely on its value. */
2462 /* this branch does not do anything sensible on windows, */
2463 /* so must not be executed on windows */
2464
2465 dup2 (fds [1], evpipe [1]);
2466 close (fds [1]);
2467 }
2468
2469 fd_intern (evpipe [1]);
2470
2471 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2472 ev_io_start (EV_A_ &pipe_w);
2473 ev_unref (EV_A); /* watcher should not keep loop alive */
2474 }
2475}
2476
2477inline_speed void
2478evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2479{
2480 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2481
2482 if (expect_true (*flag))
2483 return;
2484
2485 *flag = 1;
2486 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2487
2488 pipe_write_skipped = 1;
2489
2490 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2491
2492 if (pipe_write_wanted)
2493 {
2494 int old_errno;
2495
2496 pipe_write_skipped = 0;
2497 ECB_MEMORY_FENCE_RELEASE;
2498
2499 old_errno = errno; /* save errno because write will clobber it */
2500
2501#if EV_USE_EVENTFD
2502 if (evpipe [0] < 0)
2503 {
2504 uint64_t counter = 1;
2505 write (evpipe [1], &counter, sizeof (uint64_t));
1238 } 2506 }
1239 else 2507 else
1240# endif 2508#endif
1241 { 2509 {
1242 while (pipe (evpipe)) 2510#ifdef _WIN32
1243 ev_syserr ("(libev) error creating signal/async pipe"); 2511 WSABUF buf;
1244 2512 DWORD sent;
1245 fd_intern (evpipe [0]); 2513 buf.buf = (char *)&buf;
1246 fd_intern (evpipe [1]); 2514 buf.len = 1;
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2515 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2516#else
2517 write (evpipe [1], &(evpipe [1]), 1);
2518#endif
1248 } 2519 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279 2520
1280 errno = old_errno; 2521 errno = old_errno;
1281 } 2522 }
1282} 2523}
1283 2524
… …
1286static void 2527static void
1287pipecb (EV_P_ ev_io *iow, int revents) 2528pipecb (EV_P_ ev_io *iow, int revents)
1288{ 2529{
1289 int i; 2530 int i;
1290 2531
2532 if (revents & EV_READ)
2533 {
1291#if EV_USE_EVENTFD 2534#if EV_USE_EVENTFD
1292 if (evfd >= 0) 2535 if (evpipe [0] < 0)
1293 { 2536 {
1294 uint64_t counter; 2537 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 2538 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 2539 }
1297 else 2540 else
1298#endif 2541#endif
1299 { 2542 {
1300 char dummy; 2543 char dummy[4];
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2544#ifdef _WIN32
2545 WSABUF buf;
2546 DWORD recvd;
2547 DWORD flags = 0;
2548 buf.buf = dummy;
2549 buf.len = sizeof (dummy);
2550 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2551#else
1302 read (evpipe [0], &dummy, 1); 2552 read (evpipe [0], &dummy, sizeof (dummy));
2553#endif
2554 }
1303 } 2555 }
1304 2556
2557 pipe_write_skipped = 0;
2558
2559 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2560
2561#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 2562 if (sig_pending)
1306 { 2563 {
1307 sig_pending = 0; 2564 sig_pending = 0;
2565
2566 ECB_MEMORY_FENCE;
1308 2567
1309 for (i = EV_NSIG - 1; i--; ) 2568 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 2569 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 2570 ev_feed_signal_event (EV_A_ i + 1);
1312 } 2571 }
2572#endif
1313 2573
1314#if EV_ASYNC_ENABLE 2574#if EV_ASYNC_ENABLE
1315 if (async_pending) 2575 if (async_pending)
1316 { 2576 {
1317 async_pending = 0; 2577 async_pending = 0;
2578
2579 ECB_MEMORY_FENCE;
1318 2580
1319 for (i = asynccnt; i--; ) 2581 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent) 2582 if (asyncs [i]->sent)
1321 { 2583 {
1322 asyncs [i]->sent = 0; 2584 asyncs [i]->sent = 0;
2585 ECB_MEMORY_FENCE_RELEASE;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2586 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 } 2587 }
1325 } 2588 }
1326#endif 2589#endif
1327} 2590}
1328 2591
1329/*****************************************************************************/ 2592/*****************************************************************************/
1330 2593
2594void
2595ev_feed_signal (int signum) EV_NOEXCEPT
2596{
2597#if EV_MULTIPLICITY
2598 EV_P;
2599 ECB_MEMORY_FENCE_ACQUIRE;
2600 EV_A = signals [signum - 1].loop;
2601
2602 if (!EV_A)
2603 return;
2604#endif
2605
2606 signals [signum - 1].pending = 1;
2607 evpipe_write (EV_A_ &sig_pending);
2608}
2609
1331static void 2610static void
1332ev_sighandler (int signum) 2611ev_sighandler (int signum)
1333{ 2612{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 2613#ifdef _WIN32
1339 signal (signum, ev_sighandler); 2614 signal (signum, ev_sighandler);
1340#endif 2615#endif
1341 2616
1342 signals [signum - 1].pending = 1; 2617 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 2618}
1345 2619
1346void noinline 2620noinline
2621void
1347ev_feed_signal_event (EV_P_ int signum) 2622ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1348{ 2623{
1349 WL w; 2624 WL w;
1350 2625
1351 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2626 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1352 return; 2627 return;
1353 2628
1354 --signum; 2629 --signum;
1355 2630
1356#if EV_MULTIPLICITY 2631#if EV_MULTIPLICITY
… …
1360 if (expect_false (signals [signum].loop != EV_A)) 2635 if (expect_false (signals [signum].loop != EV_A))
1361 return; 2636 return;
1362#endif 2637#endif
1363 2638
1364 signals [signum].pending = 0; 2639 signals [signum].pending = 0;
2640 ECB_MEMORY_FENCE_RELEASE;
1365 2641
1366 for (w = signals [signum].head; w; w = w->next) 2642 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2643 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368} 2644}
1369 2645
… …
1448 2724
1449#endif 2725#endif
1450 2726
1451/*****************************************************************************/ 2727/*****************************************************************************/
1452 2728
2729#if EV_USE_IOCP
2730# include "ev_iocp.c"
2731#endif
1453#if EV_USE_PORT 2732#if EV_USE_PORT
1454# include "ev_port.c" 2733# include "ev_port.c"
1455#endif 2734#endif
1456#if EV_USE_KQUEUE 2735#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 2736# include "ev_kqueue.c"
1458#endif 2737#endif
2738#if EV_USE_LINUXAIO
2739# include "ev_linuxaio.c"
2740#endif
1459#if EV_USE_EPOLL 2741#if EV_USE_EPOLL
1460# include "ev_epoll.c" 2742# include "ev_epoll.c"
1461#endif 2743#endif
1462#if EV_USE_POLL 2744#if EV_USE_POLL
1463# include "ev_poll.c" 2745# include "ev_poll.c"
1464#endif 2746#endif
1465#if EV_USE_SELECT 2747#if EV_USE_SELECT
1466# include "ev_select.c" 2748# include "ev_select.c"
1467#endif 2749#endif
1468 2750
1469int 2751ecb_cold int
1470ev_version_major (void) 2752ev_version_major (void) EV_NOEXCEPT
1471{ 2753{
1472 return EV_VERSION_MAJOR; 2754 return EV_VERSION_MAJOR;
1473} 2755}
1474 2756
1475int 2757ecb_cold int
1476ev_version_minor (void) 2758ev_version_minor (void) EV_NOEXCEPT
1477{ 2759{
1478 return EV_VERSION_MINOR; 2760 return EV_VERSION_MINOR;
1479} 2761}
1480 2762
1481/* return true if we are running with elevated privileges and should ignore env variables */ 2763/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size 2764inline_size ecb_cold int
1483enable_secure (void) 2765enable_secure (void)
1484{ 2766{
1485#ifdef _WIN32 2767#ifdef _WIN32
1486 return 0; 2768 return 0;
1487#else 2769#else
1488 return getuid () != geteuid () 2770 return getuid () != geteuid ()
1489 || getgid () != getegid (); 2771 || getgid () != getegid ();
1490#endif 2772#endif
1491} 2773}
1492 2774
2775ecb_cold
1493unsigned int 2776unsigned int
1494ev_supported_backends (void) 2777ev_supported_backends (void) EV_NOEXCEPT
1495{ 2778{
1496 unsigned int flags = 0; 2779 unsigned int flags = 0;
1497 2780
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2781 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2782 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1500 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2783 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2784 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1501 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2785 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2786 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1503 2787
1504 return flags; 2788 return flags;
1505} 2789}
1506 2790
2791ecb_cold
1507unsigned int 2792unsigned int
1508ev_recommended_backends (void) 2793ev_recommended_backends (void) EV_NOEXCEPT
1509{ 2794{
1510 unsigned int flags = ev_supported_backends (); 2795 unsigned int flags = ev_supported_backends ();
1511 2796
1512#ifndef __NetBSD__ 2797#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */ 2798 /* kqueue is borked on everything but netbsd apparently */
… …
1521#endif 2806#endif
1522#ifdef __FreeBSD__ 2807#ifdef __FreeBSD__
1523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2808 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1524#endif 2809#endif
1525 2810
2811 /* TODO: linuxaio is very experimental */
2812 flags &= ~EVBACKEND_LINUXAIO;
2813
1526 return flags; 2814 return flags;
1527} 2815}
1528 2816
2817ecb_cold
1529unsigned int 2818unsigned int
1530ev_embeddable_backends (void) 2819ev_embeddable_backends (void) EV_NOEXCEPT
1531{ 2820{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2821 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533 2822
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2823 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */ 2824 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1536 flags &= ~EVBACKEND_EPOLL; 2825 flags &= ~EVBACKEND_EPOLL;
1537 2826
1538 return flags; 2827 return flags;
1539} 2828}
1540 2829
1541unsigned int 2830unsigned int
1542ev_backend (EV_P) 2831ev_backend (EV_P) EV_NOEXCEPT
1543{ 2832{
1544 return backend; 2833 return backend;
1545} 2834}
1546 2835
1547#if EV_FEATURE_API 2836#if EV_FEATURE_API
1548unsigned int 2837unsigned int
1549ev_iteration (EV_P) 2838ev_iteration (EV_P) EV_NOEXCEPT
1550{ 2839{
1551 return loop_count; 2840 return loop_count;
1552} 2841}
1553 2842
1554unsigned int 2843unsigned int
1555ev_depth (EV_P) 2844ev_depth (EV_P) EV_NOEXCEPT
1556{ 2845{
1557 return loop_depth; 2846 return loop_depth;
1558} 2847}
1559 2848
1560void 2849void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2850ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1562{ 2851{
1563 io_blocktime = interval; 2852 io_blocktime = interval;
1564} 2853}
1565 2854
1566void 2855void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2856ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1568{ 2857{
1569 timeout_blocktime = interval; 2858 timeout_blocktime = interval;
1570} 2859}
1571 2860
1572void 2861void
1573ev_set_userdata (EV_P_ void *data) 2862ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1574{ 2863{
1575 userdata = data; 2864 userdata = data;
1576} 2865}
1577 2866
1578void * 2867void *
1579ev_userdata (EV_P) 2868ev_userdata (EV_P) EV_NOEXCEPT
1580{ 2869{
1581 return userdata; 2870 return userdata;
1582} 2871}
1583 2872
2873void
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2874ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1585{ 2875{
1586 invoke_cb = invoke_pending_cb; 2876 invoke_cb = invoke_pending_cb;
1587} 2877}
1588 2878
2879void
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2880ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1590{ 2881{
1591 release_cb = release; 2882 release_cb = release;
1592 acquire_cb = acquire; 2883 acquire_cb = acquire;
1593} 2884}
1594#endif 2885#endif
1595 2886
1596/* initialise a loop structure, must be zero-initialised */ 2887/* initialise a loop structure, must be zero-initialised */
1597static void noinline 2888noinline ecb_cold
2889static void
1598loop_init (EV_P_ unsigned int flags) 2890loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1599{ 2891{
1600 if (!backend) 2892 if (!backend)
1601 { 2893 {
2894 origflags = flags;
2895
1602#if EV_USE_REALTIME 2896#if EV_USE_REALTIME
1603 if (!have_realtime) 2897 if (!have_realtime)
1604 { 2898 {
1605 struct timespec ts; 2899 struct timespec ts;
1606 2900
… …
1628 if (!(flags & EVFLAG_NOENV) 2922 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure () 2923 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS")) 2924 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS")); 2925 flags = atoi (getenv ("LIBEV_FLAGS"));
1632 2926
1633 ev_rt_now = ev_time (); 2927 ev_rt_now = ev_time ();
1634 mn_now = get_clock (); 2928 mn_now = get_clock ();
1635 now_floor = mn_now; 2929 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now; 2930 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API 2931#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending; 2932 invoke_cb = ev_invoke_pending;
1639#endif 2933#endif
1640 2934
1641 io_blocktime = 0.; 2935 io_blocktime = 0.;
1642 timeout_blocktime = 0.; 2936 timeout_blocktime = 0.;
1643 backend = 0; 2937 backend = 0;
1644 backend_fd = -1; 2938 backend_fd = -1;
1645 sig_pending = 0; 2939 sig_pending = 0;
1646#if EV_ASYNC_ENABLE 2940#if EV_ASYNC_ENABLE
1647 async_pending = 0; 2941 async_pending = 0;
1648#endif 2942#endif
2943 pipe_write_skipped = 0;
2944 pipe_write_wanted = 0;
2945 evpipe [0] = -1;
2946 evpipe [1] = -1;
1649#if EV_USE_INOTIFY 2947#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2948 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif 2949#endif
1652#if EV_USE_SIGNALFD 2950#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2951 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 2952#endif
1655 2953
1656 if (!(flags & 0x0000ffffU)) 2954 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 2955 flags |= ev_recommended_backends ();
1658 2956
2957#if EV_USE_IOCP
2958 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2959#endif
1659#if EV_USE_PORT 2960#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2961 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 2962#endif
1662#if EV_USE_KQUEUE 2963#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2964 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2965#endif
2966#if EV_USE_LINUXAIO
2967 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1664#endif 2968#endif
1665#if EV_USE_EPOLL 2969#if EV_USE_EPOLL
1666 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2970 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1667#endif 2971#endif
1668#if EV_USE_POLL 2972#if EV_USE_POLL
1669 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2973 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1670#endif 2974#endif
1671#if EV_USE_SELECT 2975#if EV_USE_SELECT
1672 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2976 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1673#endif 2977#endif
1674 2978
1675 ev_prepare_init (&pending_w, pendingcb); 2979 ev_prepare_init (&pending_w, pendingcb);
1676 2980
1677#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2981#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1680#endif 2984#endif
1681 } 2985 }
1682} 2986}
1683 2987
1684/* free up a loop structure */ 2988/* free up a loop structure */
1685static void noinline 2989ecb_cold
2990void
1686loop_destroy (EV_P) 2991ev_loop_destroy (EV_P)
1687{ 2992{
1688 int i; 2993 int i;
2994
2995#if EV_MULTIPLICITY
2996 /* mimic free (0) */
2997 if (!EV_A)
2998 return;
2999#endif
3000
3001#if EV_CLEANUP_ENABLE
3002 /* queue cleanup watchers (and execute them) */
3003 if (expect_false (cleanupcnt))
3004 {
3005 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3006 EV_INVOKE_PENDING;
3007 }
3008#endif
3009
3010#if EV_CHILD_ENABLE
3011 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3012 {
3013 ev_ref (EV_A); /* child watcher */
3014 ev_signal_stop (EV_A_ &childev);
3015 }
3016#endif
1689 3017
1690 if (ev_is_active (&pipe_w)) 3018 if (ev_is_active (&pipe_w))
1691 { 3019 {
1692 /*ev_ref (EV_A);*/ 3020 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 3021 /*ev_io_stop (EV_A_ &pipe_w);*/
1694 3022
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]); 3023 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]); 3024 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 } 3025 }
1706 3026
1707#if EV_USE_SIGNALFD 3027#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w)) 3028 if (ev_is_active (&sigfd_w))
1709 close (sigfd); 3029 close (sigfd);
… …
1715#endif 3035#endif
1716 3036
1717 if (backend_fd >= 0) 3037 if (backend_fd >= 0)
1718 close (backend_fd); 3038 close (backend_fd);
1719 3039
3040#if EV_USE_IOCP
3041 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3042#endif
1720#if EV_USE_PORT 3043#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3044 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 3045#endif
1723#if EV_USE_KQUEUE 3046#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3047 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3048#endif
3049#if EV_USE_LINUXAIO
3050 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1725#endif 3051#endif
1726#if EV_USE_EPOLL 3052#if EV_USE_EPOLL
1727 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3053 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1728#endif 3054#endif
1729#if EV_USE_POLL 3055#if EV_USE_POLL
1730 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3056 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1731#endif 3057#endif
1732#if EV_USE_SELECT 3058#if EV_USE_SELECT
1733 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3059 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1734#endif 3060#endif
1735 3061
1736 for (i = NUMPRI; i--; ) 3062 for (i = NUMPRI; i--; )
1737 { 3063 {
1738 array_free (pending, [i]); 3064 array_free (pending, [i]);
… …
1751 array_free (periodic, EMPTY); 3077 array_free (periodic, EMPTY);
1752#endif 3078#endif
1753#if EV_FORK_ENABLE 3079#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 3080 array_free (fork, EMPTY);
1755#endif 3081#endif
3082#if EV_CLEANUP_ENABLE
3083 array_free (cleanup, EMPTY);
3084#endif
1756 array_free (prepare, EMPTY); 3085 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 3086 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 3087#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 3088 array_free (async, EMPTY);
1760#endif 3089#endif
1761 3090
1762 backend = 0; 3091 backend = 0;
3092
3093#if EV_MULTIPLICITY
3094 if (ev_is_default_loop (EV_A))
3095#endif
3096 ev_default_loop_ptr = 0;
3097#if EV_MULTIPLICITY
3098 else
3099 ev_free (EV_A);
3100#endif
1763} 3101}
1764 3102
1765#if EV_USE_INOTIFY 3103#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 3104inline_size void infy_fork (EV_P);
1767#endif 3105#endif
1768 3106
1769inline_size void 3107inline_size void
1770loop_fork (EV_P) 3108loop_fork (EV_P)
1771{ 3109{
1772#if EV_USE_PORT 3110#if EV_USE_PORT
1773 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3111 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1774#endif 3112#endif
1775#if EV_USE_KQUEUE 3113#if EV_USE_KQUEUE
1776 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3114 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3115#endif
3116#if EV_USE_LINUXAIO
3117 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1777#endif 3118#endif
1778#if EV_USE_EPOLL 3119#if EV_USE_EPOLL
1779 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3120 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1780#endif 3121#endif
1781#if EV_USE_INOTIFY 3122#if EV_USE_INOTIFY
1782 infy_fork (EV_A); 3123 infy_fork (EV_A);
1783#endif 3124#endif
1784 3125
3126#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1785 if (ev_is_active (&pipe_w)) 3127 if (ev_is_active (&pipe_w) && postfork != 2)
1786 { 3128 {
1787 /* this "locks" the handlers against writing to the pipe */ 3129 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793 3130
1794 ev_ref (EV_A); 3131 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w); 3132 ev_io_stop (EV_A_ &pipe_w);
1796 3133
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0) 3134 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]); 3135 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807 3136
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A); 3137 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */ 3138 /* iterate over everything, in case we missed something before */
1811 pipecb (EV_A_ &pipe_w, EV_READ); 3139 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1812#endif
1813 } 3140 }
3141#endif
1814 3142
1815 postfork = 0; 3143 postfork = 0;
1816} 3144}
1817 3145
1818#if EV_MULTIPLICITY 3146#if EV_MULTIPLICITY
1819 3147
3148ecb_cold
1820struct ev_loop * 3149struct ev_loop *
1821ev_loop_new (unsigned int flags) 3150ev_loop_new (unsigned int flags) EV_NOEXCEPT
1822{ 3151{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3152 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824 3153
1825 memset (EV_A, 0, sizeof (struct ev_loop)); 3154 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags); 3155 loop_init (EV_A_ flags);
1827 3156
1828 if (ev_backend (EV_A)) 3157 if (ev_backend (EV_A))
1829 return EV_A; 3158 return EV_A;
1830 3159
3160 ev_free (EV_A);
1831 return 0; 3161 return 0;
1832} 3162}
1833 3163
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 3164#endif /* multiplicity */
1847 3165
1848#if EV_VERIFY 3166#if EV_VERIFY
1849static void noinline 3167noinline ecb_cold
3168static void
1850verify_watcher (EV_P_ W w) 3169verify_watcher (EV_P_ W w)
1851{ 3170{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3171 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853 3172
1854 if (w->pending) 3173 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3174 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856} 3175}
1857 3176
1858static void noinline 3177noinline ecb_cold
3178static void
1859verify_heap (EV_P_ ANHE *heap, int N) 3179verify_heap (EV_P_ ANHE *heap, int N)
1860{ 3180{
1861 int i; 3181 int i;
1862 3182
1863 for (i = HEAP0; i < N + HEAP0; ++i) 3183 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1868 3188
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3189 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 } 3190 }
1871} 3191}
1872 3192
1873static void noinline 3193noinline ecb_cold
3194static void
1874array_verify (EV_P_ W *ws, int cnt) 3195array_verify (EV_P_ W *ws, int cnt)
1875{ 3196{
1876 while (cnt--) 3197 while (cnt--)
1877 { 3198 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3199 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1880 } 3201 }
1881} 3202}
1882#endif 3203#endif
1883 3204
1884#if EV_FEATURE_API 3205#if EV_FEATURE_API
1885void 3206void ecb_cold
1886ev_verify (EV_P) 3207ev_verify (EV_P) EV_NOEXCEPT
1887{ 3208{
1888#if EV_VERIFY 3209#if EV_VERIFY
1889 int i; 3210 int i;
1890 WL w; 3211 WL w, w2;
1891 3212
1892 assert (activecnt >= -1); 3213 assert (activecnt >= -1);
1893 3214
1894 assert (fdchangemax >= fdchangecnt); 3215 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i) 3216 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3217 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897 3218
1898 assert (anfdmax >= 0); 3219 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i) 3220 for (i = 0; i < anfdmax; ++i)
3221 {
3222 int j = 0;
3223
1900 for (w = anfds [i].head; w; w = w->next) 3224 for (w = w2 = anfds [i].head; w; w = w->next)
1901 { 3225 {
1902 verify_watcher (EV_A_ (W)w); 3226 verify_watcher (EV_A_ (W)w);
3227
3228 if (j++ & 1)
3229 {
3230 assert (("libev: io watcher list contains a loop", w != w2));
3231 w2 = w2->next;
3232 }
3233
1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3234 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3235 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1905 } 3236 }
3237 }
1906 3238
1907 assert (timermax >= timercnt); 3239 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt); 3240 verify_heap (EV_A_ timers, timercnt);
1909 3241
1910#if EV_PERIODIC_ENABLE 3242#if EV_PERIODIC_ENABLE
… …
1925#if EV_FORK_ENABLE 3257#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 3258 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 3259 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 3260#endif
1929 3261
3262#if EV_CLEANUP_ENABLE
3263 assert (cleanupmax >= cleanupcnt);
3264 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3265#endif
3266
1930#if EV_ASYNC_ENABLE 3267#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 3268 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 3269 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 3270#endif
1934 3271
… …
1951#endif 3288#endif
1952} 3289}
1953#endif 3290#endif
1954 3291
1955#if EV_MULTIPLICITY 3292#if EV_MULTIPLICITY
3293ecb_cold
1956struct ev_loop * 3294struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else 3295#else
1959int 3296int
3297#endif
1960ev_default_loop (unsigned int flags) 3298ev_default_loop (unsigned int flags) EV_NOEXCEPT
1961#endif
1962{ 3299{
1963 if (!ev_default_loop_ptr) 3300 if (!ev_default_loop_ptr)
1964 { 3301 {
1965#if EV_MULTIPLICITY 3302#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 3303 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 3322
1986 return ev_default_loop_ptr; 3323 return ev_default_loop_ptr;
1987} 3324}
1988 3325
1989void 3326void
1990ev_default_destroy (void) 3327ev_loop_fork (EV_P) EV_NOEXCEPT
1991{ 3328{
1992#if EV_MULTIPLICITY 3329 postfork = 1;
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */
2014} 3330}
2015 3331
2016/*****************************************************************************/ 3332/*****************************************************************************/
2017 3333
2018void 3334void
… …
2020{ 3336{
2021 EV_CB_INVOKE ((W)w, revents); 3337 EV_CB_INVOKE ((W)w, revents);
2022} 3338}
2023 3339
2024unsigned int 3340unsigned int
2025ev_pending_count (EV_P) 3341ev_pending_count (EV_P) EV_NOEXCEPT
2026{ 3342{
2027 int pri; 3343 int pri;
2028 unsigned int count = 0; 3344 unsigned int count = 0;
2029 3345
2030 for (pri = NUMPRI; pri--; ) 3346 for (pri = NUMPRI; pri--; )
2031 count += pendingcnt [pri]; 3347 count += pendingcnt [pri];
2032 3348
2033 return count; 3349 return count;
2034} 3350}
2035 3351
2036void noinline 3352noinline
3353void
2037ev_invoke_pending (EV_P) 3354ev_invoke_pending (EV_P)
2038{ 3355{
2039 int pri; 3356 pendingpri = NUMPRI;
2040 3357
2041 for (pri = NUMPRI; pri--; ) 3358 do
3359 {
3360 --pendingpri;
3361
3362 /* pendingpri possibly gets modified in the inner loop */
2042 while (pendingcnt [pri]) 3363 while (pendingcnt [pendingpri])
2043 { 3364 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3365 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2045 3366
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048
2049 p->w->pending = 0; 3367 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 3368 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 3369 EV_FREQUENT_CHECK;
2052 } 3370 }
3371 }
3372 while (pendingpri);
2053} 3373}
2054 3374
2055#if EV_IDLE_ENABLE 3375#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */ 3376/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */ 3377/* only when higher priorities are idle" logic */
… …
2114 feed_reverse_done (EV_A_ EV_TIMER); 3434 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 3435 }
2116} 3436}
2117 3437
2118#if EV_PERIODIC_ENABLE 3438#if EV_PERIODIC_ENABLE
3439
3440noinline
3441static void
3442periodic_recalc (EV_P_ ev_periodic *w)
3443{
3444 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3445 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3446
3447 /* the above almost always errs on the low side */
3448 while (at <= ev_rt_now)
3449 {
3450 ev_tstamp nat = at + w->interval;
3451
3452 /* when resolution fails us, we use ev_rt_now */
3453 if (expect_false (nat == at))
3454 {
3455 at = ev_rt_now;
3456 break;
3457 }
3458
3459 at = nat;
3460 }
3461
3462 ev_at (w) = at;
3463}
3464
2119/* make periodics pending */ 3465/* make periodics pending */
2120inline_size void 3466inline_size void
2121periodics_reify (EV_P) 3467periodics_reify (EV_P)
2122{ 3468{
2123 EV_FREQUENT_CHECK; 3469 EV_FREQUENT_CHECK;
2124 3470
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3471 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 { 3472 {
2127 int feed_count = 0;
2128
2129 do 3473 do
2130 { 3474 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3475 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132 3476
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3477 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2142 ANHE_at_cache (periodics [HEAP0]); 3486 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 3487 downheap (periodics, periodiccnt, HEAP0);
2144 } 3488 }
2145 else if (w->interval) 3489 else if (w->interval)
2146 { 3490 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3491 periodic_recalc (EV_A_ w);
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]); 3492 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 3493 downheap (periodics, periodiccnt, HEAP0);
2163 } 3494 }
2164 else 3495 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3496 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2173 } 3504 }
2174} 3505}
2175 3506
2176/* simply recalculate all periodics */ 3507/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3508/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline 3509noinline ecb_cold
3510static void
2179periodics_reschedule (EV_P) 3511periodics_reschedule (EV_P)
2180{ 3512{
2181 int i; 3513 int i;
2182 3514
2183 /* adjust periodics after time jump */ 3515 /* adjust periodics after time jump */
… …
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3518 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 3519
2188 if (w->reschedule_cb) 3520 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3521 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 3522 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3523 periodic_recalc (EV_A_ w);
2192 3524
2193 ANHE_at_cache (periodics [i]); 3525 ANHE_at_cache (periodics [i]);
2194 } 3526 }
2195 3527
2196 reheap (periodics, periodiccnt); 3528 reheap (periodics, periodiccnt);
2197} 3529}
2198#endif 3530#endif
2199 3531
2200/* adjust all timers by a given offset */ 3532/* adjust all timers by a given offset */
2201static void noinline 3533noinline ecb_cold
3534static void
2202timers_reschedule (EV_P_ ev_tstamp adjust) 3535timers_reschedule (EV_P_ ev_tstamp adjust)
2203{ 3536{
2204 int i; 3537 int i;
2205 3538
2206 for (i = 0; i < timercnt; ++i) 3539 for (i = 0; i < timercnt; ++i)
… …
2243 * doesn't hurt either as we only do this on time-jumps or 3576 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here. 3577 * in the unlikely event of having been preempted here.
2245 */ 3578 */
2246 for (i = 4; --i; ) 3579 for (i = 4; --i; )
2247 { 3580 {
3581 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 3582 rtmn_diff = ev_rt_now - mn_now;
2249 3583
3584 diff = odiff - rtmn_diff;
3585
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3586 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 3587 return; /* all is well */
2252 3588
2253 ev_rt_now = ev_time (); 3589 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 3590 mn_now = get_clock ();
2255 now_floor = mn_now; 3591 now_floor = mn_now;
… …
2277 3613
2278 mn_now = ev_rt_now; 3614 mn_now = ev_rt_now;
2279 } 3615 }
2280} 3616}
2281 3617
2282void 3618int
2283ev_run (EV_P_ int flags) 3619ev_run (EV_P_ int flags)
2284{ 3620{
2285#if EV_FEATURE_API 3621#if EV_FEATURE_API
2286 ++loop_depth; 3622 ++loop_depth;
2287#endif 3623#endif
… …
2345 ev_tstamp prev_mn_now = mn_now; 3681 ev_tstamp prev_mn_now = mn_now;
2346 3682
2347 /* update time to cancel out callback processing overhead */ 3683 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100); 3684 time_update (EV_A_ 1e100);
2349 3685
3686 /* from now on, we want a pipe-wake-up */
3687 pipe_write_wanted = 1;
3688
3689 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3690
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3691 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2351 { 3692 {
2352 waittime = MAX_BLOCKTIME; 3693 waittime = MAX_BLOCKTIME;
2353 3694
2354 if (timercnt) 3695 if (timercnt)
2355 { 3696 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3697 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2357 if (waittime > to) waittime = to; 3698 if (waittime > to) waittime = to;
2358 } 3699 }
2359 3700
2360#if EV_PERIODIC_ENABLE 3701#if EV_PERIODIC_ENABLE
2361 if (periodiccnt) 3702 if (periodiccnt)
2362 { 3703 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3704 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2364 if (waittime > to) waittime = to; 3705 if (waittime > to) waittime = to;
2365 } 3706 }
2366#endif 3707#endif
2367 3708
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3709 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime)) 3710 if (expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime; 3711 waittime = timeout_blocktime;
3712
3713 /* at this point, we NEED to wait, so we have to ensure */
3714 /* to pass a minimum nonzero value to the backend */
3715 if (expect_false (waittime < backend_mintime))
3716 waittime = backend_mintime;
2371 3717
2372 /* extra check because io_blocktime is commonly 0 */ 3718 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime)) 3719 if (expect_false (io_blocktime))
2374 { 3720 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3721 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376 3722
2377 if (sleeptime > waittime - backend_fudge) 3723 if (sleeptime > waittime - backend_mintime)
2378 sleeptime = waittime - backend_fudge; 3724 sleeptime = waittime - backend_mintime;
2379 3725
2380 if (expect_true (sleeptime > 0.)) 3726 if (expect_true (sleeptime > 0.))
2381 { 3727 {
2382 ev_sleep (sleeptime); 3728 ev_sleep (sleeptime);
2383 waittime -= sleeptime; 3729 waittime -= sleeptime;
… …
2390#endif 3736#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3737 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime); 3738 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3739 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394 3740
3741 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3742
3743 ECB_MEMORY_FENCE_ACQUIRE;
3744 if (pipe_write_skipped)
3745 {
3746 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3747 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3748 }
3749
3750
2395 /* update ev_rt_now, do magic */ 3751 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime); 3752 time_update (EV_A_ waittime + sleeptime);
2397 } 3753 }
2398 3754
2399 /* queue pending timers and reschedule them */ 3755 /* queue pending timers and reschedule them */
… …
2425 loop_done = EVBREAK_CANCEL; 3781 loop_done = EVBREAK_CANCEL;
2426 3782
2427#if EV_FEATURE_API 3783#if EV_FEATURE_API
2428 --loop_depth; 3784 --loop_depth;
2429#endif 3785#endif
2430}
2431 3786
3787 return activecnt;
3788}
3789
2432void 3790void
2433ev_break (EV_P_ int how) 3791ev_break (EV_P_ int how) EV_NOEXCEPT
2434{ 3792{
2435 loop_done = how; 3793 loop_done = how;
2436} 3794}
2437 3795
2438void 3796void
2439ev_ref (EV_P) 3797ev_ref (EV_P) EV_NOEXCEPT
2440{ 3798{
2441 ++activecnt; 3799 ++activecnt;
2442} 3800}
2443 3801
2444void 3802void
2445ev_unref (EV_P) 3803ev_unref (EV_P) EV_NOEXCEPT
2446{ 3804{
2447 --activecnt; 3805 --activecnt;
2448} 3806}
2449 3807
2450void 3808void
2451ev_now_update (EV_P) 3809ev_now_update (EV_P) EV_NOEXCEPT
2452{ 3810{
2453 time_update (EV_A_ 1e100); 3811 time_update (EV_A_ 1e100);
2454} 3812}
2455 3813
2456void 3814void
2457ev_suspend (EV_P) 3815ev_suspend (EV_P) EV_NOEXCEPT
2458{ 3816{
2459 ev_now_update (EV_A); 3817 ev_now_update (EV_A);
2460} 3818}
2461 3819
2462void 3820void
2463ev_resume (EV_P) 3821ev_resume (EV_P) EV_NOEXCEPT
2464{ 3822{
2465 ev_tstamp mn_prev = mn_now; 3823 ev_tstamp mn_prev = mn_now;
2466 3824
2467 ev_now_update (EV_A); 3825 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev); 3826 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2507 w->pending = 0; 3865 w->pending = 0;
2508 } 3866 }
2509} 3867}
2510 3868
2511int 3869int
2512ev_clear_pending (EV_P_ void *w) 3870ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2513{ 3871{
2514 W w_ = (W)w; 3872 W w_ = (W)w;
2515 int pending = w_->pending; 3873 int pending = w_->pending;
2516 3874
2517 if (expect_true (pending)) 3875 if (expect_true (pending))
… …
2549 w->active = 0; 3907 w->active = 0;
2550} 3908}
2551 3909
2552/*****************************************************************************/ 3910/*****************************************************************************/
2553 3911
2554void noinline 3912noinline
3913void
2555ev_io_start (EV_P_ ev_io *w) 3914ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2556{ 3915{
2557 int fd = w->fd; 3916 int fd = w->fd;
2558 3917
2559 if (expect_false (ev_is_active (w))) 3918 if (expect_false (ev_is_active (w)))
2560 return; 3919 return;
… …
2563 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3922 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2564 3923
2565 EV_FREQUENT_CHECK; 3924 EV_FREQUENT_CHECK;
2566 3925
2567 ev_start (EV_A_ (W)w, 1); 3926 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3927 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2569 wlist_add (&anfds[fd].head, (WL)w); 3928 wlist_add (&anfds[fd].head, (WL)w);
3929
3930 /* common bug, apparently */
3931 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2570 3932
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3933 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET; 3934 w->events &= ~EV__IOFDSET;
2573 3935
2574 EV_FREQUENT_CHECK; 3936 EV_FREQUENT_CHECK;
2575} 3937}
2576 3938
2577void noinline 3939noinline
3940void
2578ev_io_stop (EV_P_ ev_io *w) 3941ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2579{ 3942{
2580 clear_pending (EV_A_ (W)w); 3943 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w))) 3944 if (expect_false (!ev_is_active (w)))
2582 return; 3945 return;
2583 3946
… …
2591 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3954 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2592 3955
2593 EV_FREQUENT_CHECK; 3956 EV_FREQUENT_CHECK;
2594} 3957}
2595 3958
2596void noinline 3959noinline
3960void
2597ev_timer_start (EV_P_ ev_timer *w) 3961ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2598{ 3962{
2599 if (expect_false (ev_is_active (w))) 3963 if (expect_false (ev_is_active (w)))
2600 return; 3964 return;
2601 3965
2602 ev_at (w) += mn_now; 3966 ev_at (w) += mn_now;
… …
2605 3969
2606 EV_FREQUENT_CHECK; 3970 EV_FREQUENT_CHECK;
2607 3971
2608 ++timercnt; 3972 ++timercnt;
2609 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3973 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2610 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3974 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2611 ANHE_w (timers [ev_active (w)]) = (WT)w; 3975 ANHE_w (timers [ev_active (w)]) = (WT)w;
2612 ANHE_at_cache (timers [ev_active (w)]); 3976 ANHE_at_cache (timers [ev_active (w)]);
2613 upheap (timers, ev_active (w)); 3977 upheap (timers, ev_active (w));
2614 3978
2615 EV_FREQUENT_CHECK; 3979 EV_FREQUENT_CHECK;
2616 3980
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3981 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618} 3982}
2619 3983
2620void noinline 3984noinline
3985void
2621ev_timer_stop (EV_P_ ev_timer *w) 3986ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2622{ 3987{
2623 clear_pending (EV_A_ (W)w); 3988 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w))) 3989 if (expect_false (!ev_is_active (w)))
2625 return; 3990 return;
2626 3991
… …
2645 ev_stop (EV_A_ (W)w); 4010 ev_stop (EV_A_ (W)w);
2646 4011
2647 EV_FREQUENT_CHECK; 4012 EV_FREQUENT_CHECK;
2648} 4013}
2649 4014
2650void noinline 4015noinline
4016void
2651ev_timer_again (EV_P_ ev_timer *w) 4017ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2652{ 4018{
2653 EV_FREQUENT_CHECK; 4019 EV_FREQUENT_CHECK;
4020
4021 clear_pending (EV_A_ (W)w);
2654 4022
2655 if (ev_is_active (w)) 4023 if (ev_is_active (w))
2656 { 4024 {
2657 if (w->repeat) 4025 if (w->repeat)
2658 { 4026 {
… …
2671 4039
2672 EV_FREQUENT_CHECK; 4040 EV_FREQUENT_CHECK;
2673} 4041}
2674 4042
2675ev_tstamp 4043ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w) 4044ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2677{ 4045{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4046 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679} 4047}
2680 4048
2681#if EV_PERIODIC_ENABLE 4049#if EV_PERIODIC_ENABLE
2682void noinline 4050noinline
4051void
2683ev_periodic_start (EV_P_ ev_periodic *w) 4052ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2684{ 4053{
2685 if (expect_false (ev_is_active (w))) 4054 if (expect_false (ev_is_active (w)))
2686 return; 4055 return;
2687 4056
2688 if (w->reschedule_cb) 4057 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4058 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 4059 else if (w->interval)
2691 { 4060 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4061 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 4062 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 4063 }
2696 else 4064 else
2697 ev_at (w) = w->offset; 4065 ev_at (w) = w->offset;
2698 4066
2699 EV_FREQUENT_CHECK; 4067 EV_FREQUENT_CHECK;
2700 4068
2701 ++periodiccnt; 4069 ++periodiccnt;
2702 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4070 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2703 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4071 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2704 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4072 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2705 ANHE_at_cache (periodics [ev_active (w)]); 4073 ANHE_at_cache (periodics [ev_active (w)]);
2706 upheap (periodics, ev_active (w)); 4074 upheap (periodics, ev_active (w));
2707 4075
2708 EV_FREQUENT_CHECK; 4076 EV_FREQUENT_CHECK;
2709 4077
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4078 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711} 4079}
2712 4080
2713void noinline 4081noinline
4082void
2714ev_periodic_stop (EV_P_ ev_periodic *w) 4083ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2715{ 4084{
2716 clear_pending (EV_A_ (W)w); 4085 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w))) 4086 if (expect_false (!ev_is_active (w)))
2718 return; 4087 return;
2719 4088
… …
2736 ev_stop (EV_A_ (W)w); 4105 ev_stop (EV_A_ (W)w);
2737 4106
2738 EV_FREQUENT_CHECK; 4107 EV_FREQUENT_CHECK;
2739} 4108}
2740 4109
2741void noinline 4110noinline
4111void
2742ev_periodic_again (EV_P_ ev_periodic *w) 4112ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2743{ 4113{
2744 /* TODO: use adjustheap and recalculation */ 4114 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w); 4115 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w); 4116 ev_periodic_start (EV_A_ w);
2747} 4117}
… …
2751# define SA_RESTART 0 4121# define SA_RESTART 0
2752#endif 4122#endif
2753 4123
2754#if EV_SIGNAL_ENABLE 4124#if EV_SIGNAL_ENABLE
2755 4125
2756void noinline 4126noinline
4127void
2757ev_signal_start (EV_P_ ev_signal *w) 4128ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2758{ 4129{
2759 if (expect_false (ev_is_active (w))) 4130 if (expect_false (ev_is_active (w)))
2760 return; 4131 return;
2761 4132
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4133 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2764#if EV_MULTIPLICITY 4135#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops", 4136 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4137 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767 4138
2768 signals [w->signum - 1].loop = EV_A; 4139 signals [w->signum - 1].loop = EV_A;
4140 ECB_MEMORY_FENCE_RELEASE;
2769#endif 4141#endif
2770 4142
2771 EV_FREQUENT_CHECK; 4143 EV_FREQUENT_CHECK;
2772 4144
2773#if EV_USE_SIGNALFD 4145#if EV_USE_SIGNALFD
… …
2820 sa.sa_handler = ev_sighandler; 4192 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 4193 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4194 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 4195 sigaction (w->signum, &sa, 0);
2824 4196
4197 if (origflags & EVFLAG_NOSIGMASK)
4198 {
2825 sigemptyset (&sa.sa_mask); 4199 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 4200 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4201 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4202 }
2828#endif 4203#endif
2829 } 4204 }
2830 4205
2831 EV_FREQUENT_CHECK; 4206 EV_FREQUENT_CHECK;
2832} 4207}
2833 4208
2834void noinline 4209noinline
4210void
2835ev_signal_stop (EV_P_ ev_signal *w) 4211ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2836{ 4212{
2837 clear_pending (EV_A_ (W)w); 4213 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w))) 4214 if (expect_false (!ev_is_active (w)))
2839 return; 4215 return;
2840 4216
… …
2871#endif 4247#endif
2872 4248
2873#if EV_CHILD_ENABLE 4249#if EV_CHILD_ENABLE
2874 4250
2875void 4251void
2876ev_child_start (EV_P_ ev_child *w) 4252ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2877{ 4253{
2878#if EV_MULTIPLICITY 4254#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4255 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif 4256#endif
2881 if (expect_false (ev_is_active (w))) 4257 if (expect_false (ev_is_active (w)))
… …
2888 4264
2889 EV_FREQUENT_CHECK; 4265 EV_FREQUENT_CHECK;
2890} 4266}
2891 4267
2892void 4268void
2893ev_child_stop (EV_P_ ev_child *w) 4269ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2894{ 4270{
2895 clear_pending (EV_A_ (W)w); 4271 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w))) 4272 if (expect_false (!ev_is_active (w)))
2897 return; 4273 return;
2898 4274
… …
2915 4291
2916#define DEF_STAT_INTERVAL 5.0074891 4292#define DEF_STAT_INTERVAL 5.0074891
2917#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4293#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2918#define MIN_STAT_INTERVAL 0.1074891 4294#define MIN_STAT_INTERVAL 0.1074891
2919 4295
2920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4296noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2921 4297
2922#if EV_USE_INOTIFY 4298#if EV_USE_INOTIFY
2923 4299
2924/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4300/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2925# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4301# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926 4302
2927static void noinline 4303noinline
4304static void
2928infy_add (EV_P_ ev_stat *w) 4305infy_add (EV_P_ ev_stat *w)
2929{ 4306{
2930 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4307 w->wd = inotify_add_watch (fs_fd, w->path,
4308 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4309 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4310 | IN_DONT_FOLLOW | IN_MASK_ADD);
2931 4311
2932 if (w->wd >= 0) 4312 if (w->wd >= 0)
2933 { 4313 {
2934 struct statfs sfs; 4314 struct statfs sfs;
2935 4315
… …
2939 4319
2940 if (!fs_2625) 4320 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4321 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs) 4322 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */ 4323 && (sfs.f_type == 0x1373 /* devfs */
4324 || sfs.f_type == 0x4006 /* fat */
4325 || sfs.f_type == 0x4d44 /* msdos */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */ 4326 || sfs.f_type == 0xEF53 /* ext2/3 */
4327 || sfs.f_type == 0x72b6 /* jffs2 */
4328 || sfs.f_type == 0x858458f6 /* ramfs */
4329 || sfs.f_type == 0x5346544e /* ntfs */
2945 || sfs.f_type == 0x3153464a /* jfs */ 4330 || sfs.f_type == 0x3153464a /* jfs */
4331 || sfs.f_type == 0x9123683e /* btrfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */ 4332 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */ 4333 || sfs.f_type == 0x01021994 /* tmpfs */
2948 || sfs.f_type == 0x58465342 /* xfs */)) 4334 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4335 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else 4336 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4337 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2952 } 4338 }
… …
2973 if (!pend || pend == path) 4359 if (!pend || pend == path)
2974 break; 4360 break;
2975 4361
2976 *pend = 0; 4362 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 4363 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 4364 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4365 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 4366 }
2981 } 4367 }
2982 4368
2983 if (w->wd >= 0) 4369 if (w->wd >= 0)
… …
2987 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4373 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2988 ev_timer_again (EV_A_ &w->timer); 4374 ev_timer_again (EV_A_ &w->timer);
2989 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4375 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2990} 4376}
2991 4377
2992static void noinline 4378noinline
4379static void
2993infy_del (EV_P_ ev_stat *w) 4380infy_del (EV_P_ ev_stat *w)
2994{ 4381{
2995 int slot; 4382 int slot;
2996 int wd = w->wd; 4383 int wd = w->wd;
2997 4384
… …
3004 4391
3005 /* remove this watcher, if others are watching it, they will rearm */ 4392 /* remove this watcher, if others are watching it, they will rearm */
3006 inotify_rm_watch (fs_fd, wd); 4393 inotify_rm_watch (fs_fd, wd);
3007} 4394}
3008 4395
3009static void noinline 4396noinline
4397static void
3010infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4398infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3011{ 4399{
3012 if (slot < 0) 4400 if (slot < 0)
3013 /* overflow, need to check for all hash slots */ 4401 /* overflow, need to check for all hash slots */
3014 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4402 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4438 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 4439 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 4440 }
3053} 4441}
3054 4442
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085}
3086
3087inline_size void 4443inline_size ecb_cold
4444void
3088ev_check_2625 (EV_P) 4445ev_check_2625 (EV_P)
3089{ 4446{
3090 /* kernels < 2.6.25 are borked 4447 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4448 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */ 4449 */
… …
3097} 4454}
3098 4455
3099inline_size int 4456inline_size int
3100infy_newfd (void) 4457infy_newfd (void)
3101{ 4458{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4459#if defined IN_CLOEXEC && defined IN_NONBLOCK
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4460 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0) 4461 if (fd >= 0)
3105 return fd; 4462 return fd;
3106#endif 4463#endif
3107 return inotify_init (); 4464 return inotify_init ();
… …
3182#else 4539#else
3183# define EV_LSTAT(p,b) lstat (p, b) 4540# define EV_LSTAT(p,b) lstat (p, b)
3184#endif 4541#endif
3185 4542
3186void 4543void
3187ev_stat_stat (EV_P_ ev_stat *w) 4544ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3188{ 4545{
3189 if (lstat (w->path, &w->attr) < 0) 4546 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0; 4547 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink) 4548 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1; 4549 w->attr.st_nlink = 1;
3193} 4550}
3194 4551
3195static void noinline 4552noinline
4553static void
3196stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4554stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3197{ 4555{
3198 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4556 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3199 4557
3200 ev_statdata prev = w->attr; 4558 ev_statdata prev = w->attr;
… …
3231 ev_feed_event (EV_A_ w, EV_STAT); 4589 ev_feed_event (EV_A_ w, EV_STAT);
3232 } 4590 }
3233} 4591}
3234 4592
3235void 4593void
3236ev_stat_start (EV_P_ ev_stat *w) 4594ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3237{ 4595{
3238 if (expect_false (ev_is_active (w))) 4596 if (expect_false (ev_is_active (w)))
3239 return; 4597 return;
3240 4598
3241 ev_stat_stat (EV_A_ w); 4599 ev_stat_stat (EV_A_ w);
… …
3262 4620
3263 EV_FREQUENT_CHECK; 4621 EV_FREQUENT_CHECK;
3264} 4622}
3265 4623
3266void 4624void
3267ev_stat_stop (EV_P_ ev_stat *w) 4625ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3268{ 4626{
3269 clear_pending (EV_A_ (W)w); 4627 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w))) 4628 if (expect_false (!ev_is_active (w)))
3271 return; 4629 return;
3272 4630
… …
3288} 4646}
3289#endif 4647#endif
3290 4648
3291#if EV_IDLE_ENABLE 4649#if EV_IDLE_ENABLE
3292void 4650void
3293ev_idle_start (EV_P_ ev_idle *w) 4651ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3294{ 4652{
3295 if (expect_false (ev_is_active (w))) 4653 if (expect_false (ev_is_active (w)))
3296 return; 4654 return;
3297 4655
3298 pri_adjust (EV_A_ (W)w); 4656 pri_adjust (EV_A_ (W)w);
… …
3303 int active = ++idlecnt [ABSPRI (w)]; 4661 int active = ++idlecnt [ABSPRI (w)];
3304 4662
3305 ++idleall; 4663 ++idleall;
3306 ev_start (EV_A_ (W)w, active); 4664 ev_start (EV_A_ (W)w, active);
3307 4665
3308 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4666 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3309 idles [ABSPRI (w)][active - 1] = w; 4667 idles [ABSPRI (w)][active - 1] = w;
3310 } 4668 }
3311 4669
3312 EV_FREQUENT_CHECK; 4670 EV_FREQUENT_CHECK;
3313} 4671}
3314 4672
3315void 4673void
3316ev_idle_stop (EV_P_ ev_idle *w) 4674ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3317{ 4675{
3318 clear_pending (EV_A_ (W)w); 4676 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w))) 4677 if (expect_false (!ev_is_active (w)))
3320 return; 4678 return;
3321 4679
… …
3335} 4693}
3336#endif 4694#endif
3337 4695
3338#if EV_PREPARE_ENABLE 4696#if EV_PREPARE_ENABLE
3339void 4697void
3340ev_prepare_start (EV_P_ ev_prepare *w) 4698ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3341{ 4699{
3342 if (expect_false (ev_is_active (w))) 4700 if (expect_false (ev_is_active (w)))
3343 return; 4701 return;
3344 4702
3345 EV_FREQUENT_CHECK; 4703 EV_FREQUENT_CHECK;
3346 4704
3347 ev_start (EV_A_ (W)w, ++preparecnt); 4705 ev_start (EV_A_ (W)w, ++preparecnt);
3348 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4706 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3349 prepares [preparecnt - 1] = w; 4707 prepares [preparecnt - 1] = w;
3350 4708
3351 EV_FREQUENT_CHECK; 4709 EV_FREQUENT_CHECK;
3352} 4710}
3353 4711
3354void 4712void
3355ev_prepare_stop (EV_P_ ev_prepare *w) 4713ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3356{ 4714{
3357 clear_pending (EV_A_ (W)w); 4715 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w))) 4716 if (expect_false (!ev_is_active (w)))
3359 return; 4717 return;
3360 4718
… …
3373} 4731}
3374#endif 4732#endif
3375 4733
3376#if EV_CHECK_ENABLE 4734#if EV_CHECK_ENABLE
3377void 4735void
3378ev_check_start (EV_P_ ev_check *w) 4736ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3379{ 4737{
3380 if (expect_false (ev_is_active (w))) 4738 if (expect_false (ev_is_active (w)))
3381 return; 4739 return;
3382 4740
3383 EV_FREQUENT_CHECK; 4741 EV_FREQUENT_CHECK;
3384 4742
3385 ev_start (EV_A_ (W)w, ++checkcnt); 4743 ev_start (EV_A_ (W)w, ++checkcnt);
3386 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4744 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3387 checks [checkcnt - 1] = w; 4745 checks [checkcnt - 1] = w;
3388 4746
3389 EV_FREQUENT_CHECK; 4747 EV_FREQUENT_CHECK;
3390} 4748}
3391 4749
3392void 4750void
3393ev_check_stop (EV_P_ ev_check *w) 4751ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3394{ 4752{
3395 clear_pending (EV_A_ (W)w); 4753 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4754 if (expect_false (!ev_is_active (w)))
3397 return; 4755 return;
3398 4756
… …
3410 EV_FREQUENT_CHECK; 4768 EV_FREQUENT_CHECK;
3411} 4769}
3412#endif 4770#endif
3413 4771
3414#if EV_EMBED_ENABLE 4772#if EV_EMBED_ENABLE
3415void noinline 4773noinline
4774void
3416ev_embed_sweep (EV_P_ ev_embed *w) 4775ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3417{ 4776{
3418 ev_run (w->other, EVRUN_NOWAIT); 4777 ev_run (w->other, EVRUN_NOWAIT);
3419} 4778}
3420 4779
3421static void 4780static void
… …
3469 ev_idle_stop (EV_A_ idle); 4828 ev_idle_stop (EV_A_ idle);
3470} 4829}
3471#endif 4830#endif
3472 4831
3473void 4832void
3474ev_embed_start (EV_P_ ev_embed *w) 4833ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3475{ 4834{
3476 if (expect_false (ev_is_active (w))) 4835 if (expect_false (ev_is_active (w)))
3477 return; 4836 return;
3478 4837
3479 { 4838 {
… …
3500 4859
3501 EV_FREQUENT_CHECK; 4860 EV_FREQUENT_CHECK;
3502} 4861}
3503 4862
3504void 4863void
3505ev_embed_stop (EV_P_ ev_embed *w) 4864ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3506{ 4865{
3507 clear_pending (EV_A_ (W)w); 4866 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w))) 4867 if (expect_false (!ev_is_active (w)))
3509 return; 4868 return;
3510 4869
… …
3520} 4879}
3521#endif 4880#endif
3522 4881
3523#if EV_FORK_ENABLE 4882#if EV_FORK_ENABLE
3524void 4883void
3525ev_fork_start (EV_P_ ev_fork *w) 4884ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3526{ 4885{
3527 if (expect_false (ev_is_active (w))) 4886 if (expect_false (ev_is_active (w)))
3528 return; 4887 return;
3529 4888
3530 EV_FREQUENT_CHECK; 4889 EV_FREQUENT_CHECK;
3531 4890
3532 ev_start (EV_A_ (W)w, ++forkcnt); 4891 ev_start (EV_A_ (W)w, ++forkcnt);
3533 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4892 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3534 forks [forkcnt - 1] = w; 4893 forks [forkcnt - 1] = w;
3535 4894
3536 EV_FREQUENT_CHECK; 4895 EV_FREQUENT_CHECK;
3537} 4896}
3538 4897
3539void 4898void
3540ev_fork_stop (EV_P_ ev_fork *w) 4899ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3541{ 4900{
3542 clear_pending (EV_A_ (W)w); 4901 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w))) 4902 if (expect_false (!ev_is_active (w)))
3544 return; 4903 return;
3545 4904
… …
3556 4915
3557 EV_FREQUENT_CHECK; 4916 EV_FREQUENT_CHECK;
3558} 4917}
3559#endif 4918#endif
3560 4919
3561#if EV_ASYNC_ENABLE 4920#if EV_CLEANUP_ENABLE
3562void 4921void
3563ev_async_start (EV_P_ ev_async *w) 4922ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3564{ 4923{
3565 if (expect_false (ev_is_active (w))) 4924 if (expect_false (ev_is_active (w)))
3566 return; 4925 return;
3567 4926
3568 w->sent = 0;
3569
3570 evpipe_init (EV_A);
3571
3572 EV_FREQUENT_CHECK; 4927 EV_FREQUENT_CHECK;
3573 4928
3574 ev_start (EV_A_ (W)w, ++asynccnt); 4929 ev_start (EV_A_ (W)w, ++cleanupcnt);
3575 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4930 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3576 asyncs [asynccnt - 1] = w; 4931 cleanups [cleanupcnt - 1] = w;
3577 4932
4933 /* cleanup watchers should never keep a refcount on the loop */
4934 ev_unref (EV_A);
3578 EV_FREQUENT_CHECK; 4935 EV_FREQUENT_CHECK;
3579} 4936}
3580 4937
3581void 4938void
3582ev_async_stop (EV_P_ ev_async *w) 4939ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3583{ 4940{
3584 clear_pending (EV_A_ (W)w); 4941 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w))) 4942 if (expect_false (!ev_is_active (w)))
3586 return; 4943 return;
3587 4944
3588 EV_FREQUENT_CHECK; 4945 EV_FREQUENT_CHECK;
4946 ev_ref (EV_A);
4947
4948 {
4949 int active = ev_active (w);
4950
4951 cleanups [active - 1] = cleanups [--cleanupcnt];
4952 ev_active (cleanups [active - 1]) = active;
4953 }
4954
4955 ev_stop (EV_A_ (W)w);
4956
4957 EV_FREQUENT_CHECK;
4958}
4959#endif
4960
4961#if EV_ASYNC_ENABLE
4962void
4963ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4964{
4965 if (expect_false (ev_is_active (w)))
4966 return;
4967
4968 w->sent = 0;
4969
4970 evpipe_init (EV_A);
4971
4972 EV_FREQUENT_CHECK;
4973
4974 ev_start (EV_A_ (W)w, ++asynccnt);
4975 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4976 asyncs [asynccnt - 1] = w;
4977
4978 EV_FREQUENT_CHECK;
4979}
4980
4981void
4982ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4983{
4984 clear_pending (EV_A_ (W)w);
4985 if (expect_false (!ev_is_active (w)))
4986 return;
4987
4988 EV_FREQUENT_CHECK;
3589 4989
3590 { 4990 {
3591 int active = ev_active (w); 4991 int active = ev_active (w);
3592 4992
3593 asyncs [active - 1] = asyncs [--asynccnt]; 4993 asyncs [active - 1] = asyncs [--asynccnt];
… …
3598 4998
3599 EV_FREQUENT_CHECK; 4999 EV_FREQUENT_CHECK;
3600} 5000}
3601 5001
3602void 5002void
3603ev_async_send (EV_P_ ev_async *w) 5003ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3604{ 5004{
3605 w->sent = 1; 5005 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending); 5006 evpipe_write (EV_A_ &async_pending);
3607} 5007}
3608#endif 5008#endif
… …
3645 5045
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5046 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647} 5047}
3648 5048
3649void 5049void
3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5050ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3651{ 5051{
3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5052 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3653
3654 if (expect_false (!once))
3655 {
3656 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3657 return;
3658 }
3659 5053
3660 once->cb = cb; 5054 once->cb = cb;
3661 once->arg = arg; 5055 once->arg = arg;
3662 5056
3663 ev_init (&once->io, once_cb_io); 5057 ev_init (&once->io, once_cb_io);
… …
3676} 5070}
3677 5071
3678/*****************************************************************************/ 5072/*****************************************************************************/
3679 5073
3680#if EV_WALK_ENABLE 5074#if EV_WALK_ENABLE
5075ecb_cold
3681void 5076void
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5077ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3683{ 5078{
3684 int i, j; 5079 int i, j;
3685 ev_watcher_list *wl, *wn; 5080 ev_watcher_list *wl, *wn;
3686 5081
3687 if (types & (EV_IO | EV_EMBED)) 5082 if (types & (EV_IO | EV_EMBED))
… …
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5125 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif 5126#endif
3732 5127
3733#if EV_IDLE_ENABLE 5128#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE) 5129 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; ) 5130 for (j = NUMPRI; j--; )
3736 for (i = idlecnt [j]; i--; ) 5131 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]); 5132 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif 5133#endif
3739 5134
3740#if EV_FORK_ENABLE 5135#if EV_FORK_ENABLE
… …
3793 5188
3794#if EV_MULTIPLICITY 5189#if EV_MULTIPLICITY
3795 #include "ev_wrap.h" 5190 #include "ev_wrap.h"
3796#endif 5191#endif
3797 5192
3798EV_CPP(})
3799

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