pcsx2/common/ScopedGuard.h

53 lines
1.1 KiB
C++

// SPDX-FileCopyrightText: 2002-2024 PCSX2 Dev Team
// SPDX-License-Identifier: GPL-3.0+
#pragma once
#include "Pcsx2Defs.h"
#include <optional>
#include <utility>
/// ScopedGuard provides an object which runs a function (usually a lambda) when
/// it goes out of scope. This can be useful for releasing resources or handles
/// which do not normally have C++ types to automatically release.
template <typename T>
class ScopedGuard final
{
public:
__fi ScopedGuard(T&& func)
: m_func(std::forward<T>(func))
{
}
__fi ScopedGuard(ScopedGuard&& other)
: m_func(std::move(other.m_func))
{
other.m_func = nullptr;
}
__fi ~ScopedGuard()
{
Run();
}
ScopedGuard(const ScopedGuard&) = delete;
void operator=(const ScopedGuard&) = delete;
/// Runs the destructor function now instead of when we go out of scope.
__fi void Run()
{
if (!m_func.has_value())
return;
m_func.value()();
m_func.reset();
}
/// Prevents the function from being invoked when we go out of scope.
__fi void Cancel()
{
m_func.reset();
}
private:
std::optional<T> m_func;
};