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Add an API for memory barriers

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George Oikonomou 2017-12-03 17:46:48 +00:00
parent 4094297d3e
commit a6dbc589a1
1 changed files with 67 additions and 0 deletions
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os/sys/memory-barrier.h Normal file
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/*
* Copyright (c) 2017, George Oikonomou - http://www.spd.gr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the copyright holder 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
* COPYRIGHT HOLDER 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.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup sys
* @{
*
* \defgroup memory-barrier CPU/Compiler memory barriers
* @{
*
* API for CPU/Compiler memory barriers
*/
/*---------------------------------------------------------------------------*/
#ifndef MEMORY_BARRIER_H_
#define MEMORY_BARRIER_H_
/*---------------------------------------------------------------------------*/
#include "contiki.h"
/*---------------------------------------------------------------------------*/
#ifdef MEMORY_BARRIER_CONF_ARCH_HEADER_PATH
#include MEMORY_BARRIER_CONF_ARCH_HEADER_PATH
#endif /* MEMORY_BARRIER_CONF_ARCH_HEADER_PATH */
/*---------------------------------------------------------------------------*/
#ifndef memory_barrier
/**
* \brief Insert a memory barrier
*
* It is the platform/CPU developer's responsibility to expand this macro to
* a function that creates a memory barrier. Calling this macro will otherwise
* not generate any code.
*/
#define memory_barrier()
#endif
/*---------------------------------------------------------------------------*/
#endif /* MEMORY_BARRIER_H_ */
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/