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3254235ecc
Submitted by: "Richard Seaman, Jr." <dick@tar.com> Native FreeBSD port of the linuxthreads library Includes added files and stuff you need to add to the rest of your system. This is for -current I'm sure Richard's older version might be a good place to start for a 3.x version.
128 lines
4.7 KiB
C
128 lines
4.7 KiB
C
/*
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* Copyright (c) 1999 Richard Seaman, Jr.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Richard Seaman, Jr.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY RICHARD SEAMAN, Jr. AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef _THREAD_SAFE
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#define _THREAD_SAFE
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#endif
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#include "pthread.h"
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/* Our internal pthreads definitions are here. Set as needed */
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#if defined(COMPILING_UTHREADS)
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#include "pthread_private.h"
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#endif
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#if defined(LINUXTHREADS)
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#include "internals.h"
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#else
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/* Your internal definition here */
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#endif
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/* These are from lib/libc/include */
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#include "libc_private.h"
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#if !defined(LINUXTHREADS)
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#include "spinlock.h"
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#endif
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/* This is defined in lib/libc/stdlib/exit.c. It turns on thread safe
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* behavior in libc if non-zero.
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*/
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extern int __isthreaded;
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/* Optional. In case our code is dependant on the existence of
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* the posix priority extentions kernel option.
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*/
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#if defined(LINUXTHREADS)
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#include <sys/sysctl.h>
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int _posix_priority_scheduling;
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#endif
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#if defined(NEWLIBC)
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/* The following are needed if we're going to get thread safe behavior
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* in the time functions in lib/libc/stdtime/localtime.c
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*/
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#if defined(COMPILING_UTHREADS)
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static struct pthread_mutex _lcl_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
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static struct pthread_mutex _gmt_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
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static struct pthread_mutex _localtime_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
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static struct pthread_mutex _gmtime_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
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static pthread_mutex_t _lcl_mutex = &_lcl_mutexd;
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static pthread_mutex_t _gmt_mutex = &_gmt_mutexd;
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static pthread_mutex_t _localtime_mutex = &_localtime_mutexd;
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static pthread_mutex_t _gmtime_mutex = &_gmtime_mutexd;
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#endif
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#if defined(LINUXTHREADS)
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static pthread_mutex_t _lcl_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _gmt_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _localtime_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _gmtime_mutex = PTHREAD_MUTEX_INITIALIZER;
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#else
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/* Customize this based on your mutex declarations */
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static pthread_mutex_t _lcl_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _gmt_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _localtime_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _gmtime_mutex = PTHREAD_MUTEX_INITIALIZER;
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#endif
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extern pthread_mutex_t *lcl_mutex;
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extern pthread_mutex_t *gmt_mutex;
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extern pthread_mutex_t *localtime_mutex;
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extern pthread_mutex_t *gmtime_mutex;
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#endif
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/* Use the constructor attribute so this gets run before main does */
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static void _pthread_initialize(void) __attribute__((constructor));
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static void _pthread_initialize(void)
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{
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#if defined(LINUXTHREADS)
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int mib[2];
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size_t len;
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len = sizeof (_posix_priority_scheduling);
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mib[0] = CTL_P1003_1B;
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mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING;
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if (-1 == sysctl (mib, 2, &_posix_priority_scheduling, &len, NULL, 0))
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_posix_priority_scheduling = 0;
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#endif
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/* This turns on thread safe behaviour in libc when we link with it */
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__isthreaded = 1;
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#if defined(NEWLIBC)
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/* Set up pointers for lib/libc/stdtime/localtime.c */
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lcl_mutex = &_lcl_mutex;
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gmt_mutex = &_gmt_mutex;
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localtime_mutex = &_localtime_mutex;
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gmtime_mutex = &_gmtime_mutex;
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#endif
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}
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