feat(memory): add TObserverPtr and the corresponding testing
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1b2ea5c2a6
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0d99fad3f0
@ -6,6 +6,7 @@
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#include "Memory/UniquePointer.h"
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#include "Memory/SharedPointer.h"
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#include "Memory/MemoryOperator.h"
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#include "Memory/ObserverPointer.h"
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#include "Miscellaneous/AssertionMacros.h"
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NAMESPACE_REDCRAFT_BEGIN
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@ -23,6 +24,7 @@ void TestMemory()
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TestPointerTraits();
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TestUniquePointer();
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TestSharedPointer();
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TestObserverPointer();
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}
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void TestAlignment()
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@ -1031,6 +1033,71 @@ void TestSharedPointer()
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}
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void TestObserverPointer()
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{
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{
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int32 IntA;
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int32 IntB;
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TObserverPtr<int32> TempA;
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TObserverPtr<int32> TempB = nullptr;
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TObserverPtr<int32> TempC(&IntA);
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TObserverPtr<int32> TempD(TempC);
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TempA = TempC;
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TempB = MakeObserver<int32>(&IntB);
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always_check(TempA == TempC);
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always_check(TempB == &IntB);
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always_check(TempB.IsValid());
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always_check(TempA.Release() == &IntA);
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always_check(!TempA.IsValid());
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TempA.Reset(&IntA);
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always_check(TempA == &IntA);
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always_check(GetTypeHash(TempA) == GetTypeHash(&IntA));
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Swap(TempA, TempB);
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always_check(TempA == &IntB);
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always_check(TempB == &IntA);
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}
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{
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int32 IntA[4];
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int32 IntB[4];
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TObserverPtr<int32[]> TempA;
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TObserverPtr<int32[]> TempB = nullptr;
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TObserverPtr<int32[]> TempC(IntA);
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TObserverPtr<int32[]> TempD(TempC);
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TempA = TempC;
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TempB = MakeObserver<int32[]>(IntB);
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always_check(TempA == TempC);
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always_check(TempB == IntB);
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always_check(TempB.IsValid());
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always_check(TempA.Release() == IntA);
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always_check(!TempA.IsValid());
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TempA.Reset(IntA);
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always_check(TempA == IntA);
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always_check(GetTypeHash(TempA) == GetTypeHash(&IntA));
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Swap(TempA, TempB);
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always_check(TempA == IntB);
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always_check(TempB == IntA);
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}
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}
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NAMESPACE_END(Testing)
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NAMESPACE_MODULE_END(Utility)
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151
Redcraft.Utility/Source/Public/Memory/ObserverPointer.h
Normal file
151
Redcraft.Utility/Source/Public/Memory/ObserverPointer.h
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@ -0,0 +1,151 @@
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#pragma once
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#include "CoreTypes.h"
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#include "Templates/Utility.h"
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#include "Templates/TypeHash.h"
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#include "Memory/PointerTraits.h"
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#include "TypeTraits/TypeTraits.h"
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#include "Miscellaneous/Compare.h"
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NAMESPACE_REDCRAFT_BEGIN
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NAMESPACE_MODULE_BEGIN(Redcraft)
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NAMESPACE_MODULE_BEGIN(Utility)
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template <typename T> requires (CObject<T> && !CBoundedArray<T>)
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class TObserverPtr;
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NAMESPACE_PRIVATE_BEGIN
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template <typename T> struct TIsTObserverPtr : FFalse { };
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template <typename T> struct TIsTObserverPtr<TObserverPtr<T>> : FTrue { };
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NAMESPACE_PRIVATE_END
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template <typename T>
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concept CTObserverPtr = NAMESPACE_PRIVATE::TIsTObserverPtr<TRemoveCV<T>>::Value;
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template <typename T> requires (CObject<T> && !CBoundedArray<T>)
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class TObserverPtr
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{
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public:
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using ElementType = T;
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FORCEINLINE constexpr TObserverPtr() : Pointer(nullptr) { }
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FORCEINLINE constexpr TObserverPtr(nullptr_t) : TObserverPtr() { }
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FORCEINLINE constexpr explicit TObserverPtr(T* InPtr) : Pointer(InPtr) { }
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FORCEINLINE constexpr TObserverPtr(const TObserverPtr&) = default;
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FORCEINLINE constexpr TObserverPtr(TObserverPtr&&) = default;
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template <typename U> requires (CConvertibleTo<U*, T*> && !CArray<U>)
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FORCEINLINE constexpr TObserverPtr(TObserverPtr<U> InValue) : Pointer(InValue.Pointer) { }
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FORCEINLINE constexpr ~TObserverPtr() = default;
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FORCEINLINE constexpr TObserverPtr& operator=(const TObserverPtr&) = default;
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FORCEINLINE constexpr TObserverPtr& operator=(TObserverPtr&&) = default;
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NODISCARD friend FORCEINLINE constexpr bool operator==(const TObserverPtr& LHS, const TObserverPtr& RHS) { return LHS.Get() == RHS.Get(); }
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NODISCARD friend FORCEINLINE constexpr strong_ordering operator<=>(const TObserverPtr& LHS, const TObserverPtr& RHS) { return LHS.Get() <=> RHS.Get(); }
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NODISCARD FORCEINLINE constexpr bool operator==(T* InPtr) const& { return Get() == InPtr; }
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NODISCARD FORCEINLINE constexpr strong_ordering operator<=>(T* InPtr) const& { return Get() <=> InPtr; }
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NODISCARD FORCEINLINE constexpr T* Release() { return Exchange(Pointer, nullptr); }
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FORCEINLINE constexpr void Reset(T* InPtr = nullptr) { Pointer = InPtr; }
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NODISCARD FORCEINLINE constexpr T* Get() const { return Pointer; }
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NODISCARD FORCEINLINE constexpr bool IsValid() const { return Get() != nullptr; }
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NODISCARD FORCEINLINE constexpr explicit operator bool() const { return Get() != nullptr; }
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NODISCARD FORCEINLINE constexpr T& operator*() const { checkf(IsValid(), TEXT("Read access violation. Please check IsValid().")); return *Get(); }
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NODISCARD FORCEINLINE constexpr T* operator->() const { checkf(IsValid(), TEXT("Read access violation. Please check IsValid().")); return Get(); }
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NODISCARD FORCEINLINE constexpr operator ElementType*() { return Get(); }
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NODISCARD FORCEINLINE constexpr operator const ElementType*() const { return Get(); }
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NODISCARD friend FORCEINLINE constexpr size_t GetTypeHash(const TObserverPtr& A) { return GetTypeHash(A.Get()); }
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friend FORCEINLINE constexpr void Swap(TObserverPtr& A, TObserverPtr& B) { Swap(A.Pointer, B.Pointer); }
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private:
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T* Pointer;
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};
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template <typename T>
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class TObserverPtr<T[]>
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{
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public:
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using ElementType = T;
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FORCEINLINE constexpr TObserverPtr() : Pointer(nullptr) { }
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FORCEINLINE constexpr TObserverPtr(nullptr_t) : TObserverPtr() { }
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template <typename U = T*> requires (CPointer<U> && CConvertibleTo<TRemovePointer<U>(*)[], T(*)[]>)
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FORCEINLINE constexpr explicit TObserverPtr(U InPtr) : Pointer(InPtr) { }
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FORCEINLINE constexpr TObserverPtr(const TObserverPtr&) = default;
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FORCEINLINE constexpr TObserverPtr(TObserverPtr&&) = default;
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template <typename U> requires (CConvertibleTo<TRemoveExtent<U>(*)[], T(*)[]> && CArray<U>)
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FORCEINLINE constexpr TObserverPtr(TObserverPtr<U> InValue) : Pointer(InValue.Pointer) { }
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FORCEINLINE constexpr ~TObserverPtr() = default;
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FORCEINLINE constexpr TObserverPtr& operator=(const TObserverPtr&) = default;
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FORCEINLINE constexpr TObserverPtr& operator=(TObserverPtr&&) = default;
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NODISCARD friend FORCEINLINE constexpr bool operator==(const TObserverPtr& LHS, const TObserverPtr& RHS) { return LHS.Get() == RHS.Get(); }
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NODISCARD friend FORCEINLINE constexpr strong_ordering operator<=>(const TObserverPtr& LHS, const TObserverPtr& RHS) { return LHS.Get() <=> RHS.Get(); }
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template <typename U = T*> requires (CNullPointer<U> || (CPointer<U> && CConvertibleTo<TRemovePointer<U>(*)[], T(*)[]>))
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NODISCARD FORCEINLINE constexpr bool operator==(U InPtr) const& { return Get() == InPtr; }
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template <typename U = T*> requires (CNullPointer<U> || (CPointer<U> && CConvertibleTo<TRemovePointer<U>(*)[], T(*)[]>))
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NODISCARD FORCEINLINE constexpr strong_ordering operator<=>(U InPtr) const& { return Get() <=> InPtr; }
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NODISCARD FORCEINLINE constexpr T* Release() { return Exchange(Pointer, nullptr); }
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template <typename U = T*> requires (CNullPointer<U> || (CPointer<U> && CConvertibleTo<TRemovePointer<U>(*)[], T(*)[]>))
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FORCEINLINE constexpr void Reset(U InPtr = nullptr) { Pointer = InPtr; }
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NODISCARD FORCEINLINE constexpr T* Get() const { return Pointer; }
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NODISCARD FORCEINLINE constexpr bool IsValid() const { return Get() != nullptr; }
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NODISCARD FORCEINLINE constexpr explicit operator bool() const { return Get() != nullptr; }
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NODISCARD FORCEINLINE constexpr T& operator[](size_t Index) const { checkf(IsValid(), TEXT("Read access violation. Please check IsValid().")); return Get()[Index]; }
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NODISCARD FORCEINLINE constexpr operator ElementType*() { return Get(); }
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NODISCARD FORCEINLINE constexpr operator const ElementType*() const { return Get(); }
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NODISCARD friend FORCEINLINE constexpr size_t GetTypeHash(const TObserverPtr& A) { return GetTypeHash(A.Get()); }
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friend FORCEINLINE constexpr void Swap(TObserverPtr& A, TObserverPtr& B) { Swap(A.Pointer, B.Pointer); }
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private:
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T* Pointer;
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};
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template <typename T> requires (CObject<T> && !CBoundedArray<T>)
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NODISCARD FORCEINLINE constexpr TObserverPtr<T> MakeObserver(TRemoveExtent<T>* InPtr) { return TObserverPtr<T>(InPtr); }
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DEFINE_TPointerTraits(TObserverPtr);
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NAMESPACE_MODULE_END(Utility)
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NAMESPACE_MODULE_END(Redcraft)
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NAMESPACE_REDCRAFT_END
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@ -16,6 +16,7 @@ REDCRAFTUTILITY_API void TestMemoryOperator();
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REDCRAFTUTILITY_API void TestPointerTraits();
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REDCRAFTUTILITY_API void TestUniquePointer();
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REDCRAFTUTILITY_API void TestSharedPointer();
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REDCRAFTUTILITY_API void TestObserverPointer();
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NAMESPACE_END(Testing)
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