mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-10-24 16:15:43 +00:00
36 lines
1,001 B
C
36 lines
1,001 B
C
|
#pragma once
|
||
|
#include "types.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:
|
||
|
ALWAYS_INLINE ScopedGuard(T&& func) : m_func(std::forward<T>(func)) {}
|
||
|
ALWAYS_INLINE ScopedGuard(ScopedGuard&& other) : m_func(std::move(other.m_func)) { other.m_func = nullptr; }
|
||
|
ALWAYS_INLINE ~ScopedGuard() { Invoke(); }
|
||
|
|
||
|
ScopedGuard(const ScopedGuard&) = delete;
|
||
|
void operator=(const ScopedGuard&) = delete;
|
||
|
|
||
|
/// Prevents the function from being invoked when we go out of scope.
|
||
|
ALWAYS_INLINE void Cancel() { m_func.reset(); }
|
||
|
|
||
|
/// Explicitly fires the function.
|
||
|
ALWAYS_INLINE void Invoke()
|
||
|
{
|
||
|
if (!m_func.has_value())
|
||
|
return;
|
||
|
|
||
|
m_func.value()();
|
||
|
m_func.reset();
|
||
|
}
|
||
|
|
||
|
private:
|
||
|
std::optional<T> m_func;
|
||
|
};
|