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/* Copyright (c) 2017, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef ODP_FRAGREASS_PP_ATOMICS_H_
#define ODP_FRAGREASS_PP_ATOMICS_H_
#include <example_debug.h>
#if __SIZEOF_POINTER__ == 4
/**
* A wrapper function to perform a 64-bit "strong" atomic compare and swap
* (CAS) operation. This generic version of the function is used if an
* architecture-specific (e.g. lockless) variant is not specified.
*
* @param var The location at which the CAS should take place
* @param exp A pointer to the expected value
* @param neu A pointer to the new value to be written on success
* @param mo_success The memory order on success
* @param mo_failure The memory order on failure
*
* @return Whether the operation succeeded
*/
static inline bool atomic_strong_cas_dblptr(uint64_t *var, uint64_t *exp,
uint64_t neu, int mo_success,
int mo_failure)
{
return __atomic_compare_exchange_n(var, exp, neu, 0, mo_success,
mo_failure);
}
#elif __SIZEOF_POINTER__ == 8
/**
* A wrapper function to perform a 128-bit "strong" atomic compare and swap
* (CAS) operation. This generic version of the function is used if an
* architecture-specific (e.g. lockless) variant is not specified.
*
* @param var The location at which the CAS should take place
* @param exp A pointer to the expected value
* @param neu A pointer to the new value to be written on success
* @param mo_success The memory order on success
* @param mo_failure The memory order on failure
*
* @return Whether the operation succeeded
*/
static inline bool atomic_strong_cas_dblptr(__int128 *var, __int128 *exp,
__int128 neu, int mo_success,
int mo_failure)
{
return __atomic_compare_exchange_n(var, exp, neu, 0, mo_success,
mo_failure);
}
#endif
#endif
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