Enrico Fraccaroli
35 lines
987 B
C
35 lines
987 B
C
/// MentOS, The Mentoring Operating system project
|
|
/// @file spinlock.h
|
|
/// @brief
|
|
/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
|
|
/// See LICENSE.md for details.
|
|
|
|
#pragma once
|
|
|
|
#include "stdatomic.h"
|
|
|
|
/// Determines if the spinlock is free.
|
|
#define SPINLOCK_FREE 0
|
|
/// Determines if the spinlock is busy.
|
|
#define SPINLOCK_BUSY 1
|
|
|
|
/// @brief Spinlock structure.
|
|
typedef atomic_t spinlock_t;
|
|
|
|
/// @brief Initialize the spinlock.
|
|
/// @param spinlock The spinlock we initialize.
|
|
void spinlock_init(spinlock_t *spinlock);
|
|
|
|
/// @brief Try to lock the spinlock.
|
|
/// @param spinlock The spinlock we lock.
|
|
void spinlock_lock(spinlock_t *spinlock);
|
|
|
|
/// @brief Try to unlock the spinlock.
|
|
/// @param spinlock The spinlock we unlock.
|
|
void spinlock_unlock(spinlock_t *spinlock);
|
|
|
|
/// @brief Try to unlock the spinlock.
|
|
/// @param spinlock The spinlock we try to block.
|
|
/// @return 1 if succeeded, 0 otherwise.
|
|
int spinlock_trylock(spinlock_t *spinlock);
|