//
// Created by Stepan Usatiuk on 20.08.2023.
//

#ifndef FICUS_MUTEX_H
#define FICUS_MUTEX_H

#include <atomic>
#include <cstddef>
#include <cstdint>

#include "List.hpp"
#include "Spinlock.hpp"

struct Task;
struct TaskListNode;

class Mutex {
public:
    Mutex() = default;

    void lock();
    //    void spin_lock();
    bool try_lock();
    void unlock();
    // Same as unlock, but assumes scheduler lock is taken
    void  unlock_nolock();
    bool  test();
    Task *owner() { return _owner; }

private:
    std::atomic<bool> locked = false;

    List<Task *> waiters;
    Spinlock     waiters_lock;

    Task   *_owner       = nullptr;
    uint8_t spin_success = 127;
};


#endif //FICUS_MUTEX_H