109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
#pragma once
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#include <type_traits>
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template<typename __ResourceTraits>
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class ResourceObject {
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public:
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using HandleType = typename __ResourceTraits::HandleType;
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private:
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HandleType _Handle;
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public:
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ResourceObject() noexcept :
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_Handle(__ResourceTraits::InvalidValue) {}
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explicit ResourceObject(const HandleType& Handle) noexcept :
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_Handle(Handle) {}
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//
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// Copy constructor is not allowed
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//
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ResourceObject(const ResourceObject<__ResourceTraits>& Other) = delete;
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ResourceObject(ResourceObject<__ResourceTraits>&& Other) noexcept :
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_Handle(Other._Handle)
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{
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Other._Handle = __ResourceTraits::InvalidValue;
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}
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//
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// Copy assignment is not allowed
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//
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ResourceObject<__ResourceTraits>&
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operator=(const ResourceObject<__ResourceTraits>& Other) = delete;
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ResourceObject<__ResourceTraits>&
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operator=(ResourceObject<__ResourceTraits>&& Other) noexcept {
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_Handle = Other._Handle;
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Other._Handle = __ResourceTraits::InvalidValue;
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return *this;
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}
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template<typename __DummyType = int,
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typename = typename std::enable_if<std::is_pointer<HandleType>::value, __DummyType>::type>
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HandleType operator->() const noexcept {
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return _Handle;
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}
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operator HandleType() const noexcept {
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return _Handle;
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}
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// Check if handle is a valid handle
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bool IsValid() const noexcept {
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return _Handle != __ResourceTraits::InvalidValue;
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}
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HandleType Get() const noexcept {
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return _Handle;
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}
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void TakeOver(const HandleType& Handle) noexcept {
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if (_Handle != __ResourceTraits::InvalidValue) {
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__ResourceTraits::Releasor(_Handle);
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_Handle = __ResourceTraits::InvalidValue;
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} else {
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_Handle = Handle;
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}
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}
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void Abandon() noexcept {
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_Handle = __ResourceTraits::InvalidValue;
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}
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// Force release
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void Release() {
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if (_Handle != __ResourceTraits::InvalidValue) {
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__ResourceTraits::Releasor(_Handle);
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_Handle = __ResourceTraits::InvalidValue;
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}
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}
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~ResourceObject() {
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if (_Handle != __ResourceTraits::InvalidValue) {
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__ResourceTraits::Releasor(_Handle);
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_Handle = __ResourceTraits::InvalidValue;
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}
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}
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};
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template<typename __ClassType>
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struct CppObjectTraits {
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using HandleType = __ClassType*;
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static inline const HandleType InvalidValue = nullptr;
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static inline void Releasor(HandleType pObject) {
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delete pObject;
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}
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};
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template<typename __ClassType>
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struct CppDynamicArrayTraits {
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using HandleType = __ClassType*;
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static inline const HandleType InvalidValue = nullptr;
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static inline void Releasor(HandleType pArray) {
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delete[] pArray;
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}
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};
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