sof/xtos/include/rtos/mutex.h

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/* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright(c) 2022 Intel Corporation. All rights reserved.
*
*/
/*
* Simple mutex implementation for SOF.
*/
#ifndef __XTOS_RTOS_MUTEX_H
#define __XTOS_RTOS_MUTEX_H
#include <rtos/kernel.h>
#include <rtos/spinlock.h>
#include <stdint.h>
#define K_FOREVER ((k_timeout_t) { .ticks = 0xffffffff })
struct k_mutex {
struct k_spinlock lock;
k_spinlock_key_t key;
};
static inline int k_mutex_init(struct k_mutex *mutex)
{
k_spinlock_init(&mutex->lock);
return 0;
}
static inline int k_mutex_lock(struct k_mutex *mutex, k_timeout_t timeout)
{
mutex->key = k_spin_lock(&mutex->lock);
return 0;
}
static inline int k_mutex_unlock(struct k_mutex *mutex)
{
k_spin_unlock(&mutex->lock, mutex->key);
return 0;
}
#endif