Common: Add ScopedGuard

This commit is contained in:
Connor McLaughlin 2021-10-16 09:57:50 +10:00 committed by refractionpcsx2
parent 52eab49359
commit de8b4f17a1
4 changed files with 65 additions and 2 deletions

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@ -76,6 +76,7 @@ target_sources(common PRIVATE
RwMutex.h RwMutex.h
SafeArray.h SafeArray.h
ScopedAlloc.h ScopedAlloc.h
ScopedGuard.h
ScopedPtrMT.h ScopedPtrMT.h
SettingsInterface.h SettingsInterface.h
SettingsWrapper.h SettingsWrapper.h

58
common/ScopedGuard.h Normal file
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@ -0,0 +1,58 @@
/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2021 PCSX2 Dev Team
*
* PCSX2 is free software: you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with PCSX2.
* If not, see <http://www.gnu.org/licenses/>.
*/
#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()
{
if (!m_func.has_value())
return;
m_func.value()();
m_func.reset();
}
ScopedGuard(const ScopedGuard&) = delete;
void operator=(const ScopedGuard&) = delete;
/// Prevents the function from being invoked when we go out of scope.
__fi void Cancel()
{
m_func.reset();
}
private:
std::optional<T> m_func;
};

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@ -98,6 +98,7 @@
<ClInclude Include="boost_spsc_queue.hpp" /> <ClInclude Include="boost_spsc_queue.hpp" />
<ClInclude Include="FastJmp.h" /> <ClInclude Include="FastJmp.h" />
<ClInclude Include="ScopedAlloc.h" /> <ClInclude Include="ScopedAlloc.h" />
<ClInclude Include="ScopedGuard.h" />
<ClInclude Include="StringUtil.h" /> <ClInclude Include="StringUtil.h" />
<ClInclude Include="SettingsInterface.h" /> <ClInclude Include="SettingsInterface.h" />
<ClInclude Include="SettingsWrapper.h" /> <ClInclude Include="SettingsWrapper.h" />

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@ -270,6 +270,9 @@
<ClInclude Include="SettingsWrapper.h"> <ClInclude Include="SettingsWrapper.h">
<Filter>Header Files</Filter> <Filter>Header Files</Filter>
</ClInclude> </ClInclude>
<ClInclude Include="ScopedGuard.h">
<Filter>Header Files</Filter>
</ClInclude>
</ItemGroup> </ItemGroup>
<ItemGroup> <ItemGroup>
<Filter Include="Source Files"> <Filter Include="Source Files">