atomic_utils_arch.h
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1 /*
2  * Copyright (C) 2020 Otto-von-Guericke-Universität Magdeburg
3  * 2021 Gerson Fernando Budke
4  *
5  * This file is subject to the terms and conditions of the GNU Lesser General
6  * Public License v2.1. See the file LICENSE in the top level directory for more
7  * details.
8  */
9 
21 #ifndef ATOMIC_UTILS_ARCH_H
22 #define ATOMIC_UTILS_ARCH_H
23 #ifndef DOXYGEN
24 
25 #include "periph_cpu.h"
26 
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30 
31 /* clang provides no built-in atomic access to regular variables */
32 #ifndef __clang__
33 
34 #define HAS_ATOMIC_LOAD_U8
35 static inline uint8_t atomic_load_u8(const volatile uint8_t *var)
36 {
37  return __atomic_load_1(var, __ATOMIC_SEQ_CST);
38 }
39 
40 #define HAS_ATOMIC_STORE_U8
41 static inline void atomic_store_u8(volatile uint8_t *dest, uint8_t val)
42 {
43  __atomic_store_1(dest, val, __ATOMIC_SEQ_CST);
44 }
45 
46 #endif /* __clang__ */
47 
48 #ifdef __cplusplus
49 }
50 #endif
51 
52 #endif /* DOXYGEN */
53 #endif /* ATOMIC_UTILS_ARCH_H */
atomic_store_u8
static void atomic_store_u8(volatile uint8_t *dest, uint8_t val)
Store an uint8_t atomically.
atomic_load_u8
static uint8_t atomic_load_u8(const volatile uint8_t *var)
Load an uint8_t atomically.