1
0
Fork 0
mirror of https://github.com/hermitcore/libhermit.git synced 2025-03-09 00:00:03 +01:00
libhermit/arch/x86/include/asm/atomic.h

71 lines
2.3 KiB
C
Raw Permalink Normal View History

/*
* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @author Stefan Lankes
* @file arch/x86/include/asm/atomic.h
* @brief Functions for atomic operations
*
2015-07-30 22:53:05 +02:00
* This file prepare atomic operations on int32 & int64_t variables
* which will be used in locking-mechanisms.
*/
#ifndef __ARCH_ATOMIC_H__
#define __ARCH_ATOMIC_H__
#include <hermit/stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
#if MAX_CORES > 1
#define LOCK "lock ; "
#else
#define LOCK ""
#endif
2015-07-30 22:53:05 +02:00
/** @brief Makro for initialization of atomic vars
*
2015-07-30 22:53:05 +02:00
* Whenever you use an atomic variable, init it with
* this macro first.\n
* Example: atomic_int32_t myAtomicVar = ATOMIC_INIT(123);
*
* @param i The number value you want to init it with.
*/
#define ATOMIC_INIT(i) { (i) }
2015-07-30 22:53:05 +02:00
#include <asm/atomic32.h>
#include <asm/atomic64.h>
#ifdef __cplusplus
}
#endif
#endif