#pragma once

#include "core/os/mutex.h"

struct SharedMutex {
	void lock_shared();
	void unlock_shared();
	void lock_exclusive();
	void unlock_exclusive();
	bool is_locked();

private:
	BinaryMutex lock{};
	unsigned shared_count{};

public:
	class LockExclusive {
		SharedMutex &mtx;

	public:
		explicit LockExclusive(SharedMutex &mtx);
		~LockExclusive();
		LockExclusive() = delete;
		LockExclusive(LockExclusive &) = delete;
		LockExclusive(LockExclusive &&) = delete;
		LockExclusive &operator=(LockExclusive &) = delete;
	};
	class LockShared {
		SharedMutex &mtx;

	public:
		explicit LockShared(SharedMutex &mtx);
		~LockShared();
		LockShared() = delete;
		LockShared(LockShared &) = delete;
		LockShared(LockShared &&) = delete;
		LockShared &operator=(LockShared &) = delete;
	};
};