78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
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// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "UObject/GCObject.h"
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/**
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* Specific implementation of FGCObject that prevents a single UObject-based pointer from being GC'd while this guard is in scope.
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* @note This is the lean version of TStrongObjectPtr which uses an inline FGCObject so *can't* safely be used with containers that treat types as trivially relocatable.
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*/
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class FGCObjectScopeGuard: public FGCObject
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{
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public:
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explicit FGCObjectScopeGuard(const UObject* InObject)
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: Object(InObject)
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{
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}
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virtual ~FGCObjectScopeGuard()
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{
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}
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/** Non-copyable */
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FGCObjectScopeGuard(const FGCObjectScopeGuard&) = delete;
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FGCObjectScopeGuard& operator=(const FGCObjectScopeGuard&) = delete;
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//~ FGCObject interface
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virtual void AddReferencedObjects(FReferenceCollector& Collector) override
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{
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Collector.AddReferencedObject(Object);
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}
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virtual FString GetReferencerName() const override
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{
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return TEXT("FGCObjectScopeGuard");
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}
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private:
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const UObject* Object;
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};
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/**
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* Specific implementation of FGCObject that prevents an array of UObject-based pointers from being GC'd while this guard is in scope.
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*/
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template <typename ObjectType>
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class TGCObjectsScopeGuard: public FGCObject
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{
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static_assert(TPointerIsConvertibleFromTo<ObjectType, const UObjectBase>::Value, "TGCObjectsScopeGuard: ObjectType must be pointers to a type derived from UObject");
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public:
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explicit TGCObjectsScopeGuard(const TArray<ObjectType*>& InObjects)
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: Objects(InObjects)
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{
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}
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virtual ~TGCObjectsScopeGuard()
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{
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}
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/** Non-copyable */
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TGCObjectsScopeGuard(const TGCObjectsScopeGuard&) = delete;
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TGCObjectsScopeGuard& operator=(const TGCObjectsScopeGuard&) = delete;
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//~ FGCObject interface
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virtual void AddReferencedObjects(FReferenceCollector& Collector) override
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{
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Collector.AddReferencedObjects(Objects);
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}
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virtual FString GetReferencerName() const override
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{
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return TEXT("TGCObjectsScopeGuard");
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}
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private:
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TArray<ObjectType*> Objects;
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};
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