dolphin/Source/Core/Common/ScopeGuard.h

// Copyright 2015 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include <functional>

namespace Common
{

class ScopeGuard final
{
public:
	template<class Callable>
	ScopeGuard(Callable&& finalizer) : m_finalizer(std::forward<Callable>(finalizer)) {}

	ScopeGuard(ScopeGuard&& other) : m_finalizer(std::move(other.m_finalizer))
	{
		other.m_finalizer = nullptr;
	}

	~ScopeGuard()
	{
		Exit();
	}

	void Dismiss()
	{
		m_finalizer = nullptr;
	}

	void Exit()
	{
		if (m_finalizer)
		{
			m_finalizer(); // must not throw
			m_finalizer = nullptr;
		}
	}

	ScopeGuard(const ScopeGuard&) = delete;

	void operator=(const ScopeGuard&) = delete;

private:
	std::function<void()> m_finalizer;
};

}  // Namespace Common