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43 lines
732 B
C++
43 lines
732 B
C++
//
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// Created by Stepan Usatiuk on 20.08.2023.
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//
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#ifndef OS1_MUTEX_H
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#define OS1_MUTEX_H
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#include <atomic>
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#include <cstddef>
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#include <cstdint>
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#include "List.hpp"
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#include "Spinlock.hpp"
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struct Task;
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struct TaskListNode;
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class Mutex {
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public:
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Mutex() = default;
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void lock();
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// void spin_lock();
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bool try_lock();
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void unlock();
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// Same as unlock, but assumes scheduler lock is taken
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void unlock_nolock();
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bool test();
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Task *owner() { return _owner; }
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private:
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std::atomic<bool> locked = false;
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List<Task *> waiters;
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Spinlock waiters_lock;
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Task *_owner = nullptr;
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uint8_t spin_success = 127;
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};
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#endif //OS1_MUTEX_H
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