stdatomic.h

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/*
 * Copyright (c) 2024 Raspberry Pi (Trading) Ltd.
 * Copyright (c) 2024 Stephen Street ([email protected]).
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
#ifndef __STDATOMIC_H
#define __STDATOMIC_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stdint.h>
#include_next <stdatomic.h>
 
// needed for PICO_C_COMPILER_IS_GNU
#include "pico.h"
 
#if PICO_RP2040 && PICO_C_COMPILER_IS_GNU
// on GNU without exclusive instructions these don't get routed thru _1 functions for some reason
#undef atomic_flag_test_and_set
#undef atomic_flag_test_and_set_explicit
 
extern _Bool __atomic_test_and_set_c(volatile void *mem, int model);
 
#define atomic_flag_test_and_set(PTR) __atomic_test_and_set_c((PTR), __ATOMIC_SEQ_CST)
#define atomic_flag_test_and_set_explicit(PTR, MO) __atomic_test_and_set_c((PTR), (MO))
#endif
 
#ifdef __cplusplus
}
#endif
#endif