/*
 * SPDX-FileCopyrightText: 2012 Adam Hraska
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

/** @addtogroup libc
 * @{
 */
/** @file
 */

#ifndef _LIBC_COMPILER_BARRIER_H_
#define _LIBC_COMPILER_BARRIER_H_

#include <stdatomic.h>

static inline void compiler_barrier(void)
{
	atomic_signal_fence(memory_order_seq_cst);
}

static inline void memory_barrier(void)
{
	atomic_thread_fence(memory_order_seq_cst);
}

static inline void read_barrier(void)
{
	atomic_thread_fence(memory_order_acquire);
}

static inline void write_barrier(void)
{
	atomic_thread_fence(memory_order_release);
}

/** Forces the compiler to access (ie load/store) the variable only once. */
#define ACCESS_ONCE(var) (*((volatile typeof(var)*)&(var)))

#endif /* _LIBC_COMPILER_BARRIER_H_ */