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73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
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* SPDX-FileCopyrightText: 2020 Otto-von-Guericke-Universität Magdeburg
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* SPDX-License-Identifier: LGPL-2.1-only
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*/
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#pragma once
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/**
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* @ingroup cpu_arm7_common
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*
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* @{
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*
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* @file
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* @brief Implementation of fast atomic utility functions
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* @author Marian Buschsieweke <marian.buschsieweke@ovgu.de>
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*/
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#ifndef DOXYGEN
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#include "periph_cpu.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* clang provides no built-in atomic access to regular variables */
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#ifndef __clang__
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#define HAS_ATOMIC_LOAD_U8
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static inline uint8_t atomic_load_u8(const volatile uint8_t *var)
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{
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return __atomic_load_1(var, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_LOAD_U16
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static inline uint16_t atomic_load_u16(const volatile uint16_t *var)
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{
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return __atomic_load_2(var, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_LOAD_U32
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static inline uint32_t atomic_load_u32(const volatile uint32_t *var)
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{
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return __atomic_load_4(var, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_STORE_U8
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static inline void atomic_store_u8(volatile uint8_t *dest, uint8_t val)
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{
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__atomic_store_1(dest, val, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_STORE_U16
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static inline void atomic_store_u16(volatile uint16_t *dest, uint16_t val)
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{
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__atomic_store_2(dest, val, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_STORE_U32
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static inline void atomic_store_u32(volatile uint32_t *dest, uint32_t val)
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{
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__atomic_store_4(dest, val, __ATOMIC_SEQ_CST);
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}
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#endif /* __clang__ */
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#ifdef __cplusplus
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}
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#endif
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#endif /* DOXYGEN */
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/** @} */
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