mirror of https://github.com/PCSX2/pcsx2.git
53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
// SPDX-FileCopyrightText: 2002-2023 PCSX2 Dev Team
|
|
// SPDX-License-Identifier: LGPL-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;
|
|
};
|