FLinkerPlaceholderBase Class Reference

#include <LinkerPlaceholderBase.h>

Inheritance diagram for FLinkerPlaceholderBase:

Public Member Functions
	FLinkerPlaceholderBase ()
virtual	~FLinkerPlaceholderBase ()
bool	AddReferencingPropertyValue (FFieldVariant ReferencingProperty, void *DataPtr)
virtual bool	HasKnownReferences () const
virtual int32	ResolveAllPlaceholderReferences (UObject *ReplacementObj)
void	SetupPlaceholderSubobject (ULinkerPlaceholderExportObject *PlaceholderSubobject)
bool	IsDeferredSubobject () const
TArray< ULinkerPlaceholderExportObject * > &	GetSubobjectPlaceholders ()
bool	HasBeenFullyResolved () const
virtual UObject *	GetPlaceholderAsUObject () bool IsMarkedResolved() const

Public Attributes
FPackageIndex	PackageIndex
TWeakObjectPtr< const UClass >	DeferredObjectType

Protected Member Functions
void	MarkAsResolved ()

Friends
class	FLinkerPlaceholderObjectImpl

Constructor & Destructor Documentation

FLinkerPlaceholderBase()

FLinkerPlaceholderBase::FLinkerPlaceholderBase

(

)

~FLinkerPlaceholderBase()

FLinkerPlaceholderBase::~FLinkerPlaceholderBase ( )

virtual

Member Function Documentation

AddReferencingPropertyValue()

bool FLinkerPlaceholderBase::AddReferencingPropertyValue	(	FFieldVariant	ReferencingProperty,
		void *	DataPtr
	)

Attempts to find and store the referencing container object (along with
the specified property), so that we can replace the reference at a later point. Can fail if the container could not be found.

Parameters

ReferencingProperty	The property whose object-value is referencing this.
DataPtr	Not saved off (as it can change), but used to verify that we pick the correct container.

Returns

True if we successfully found a container object and are now tracking it, otherwise false.

GetPlaceholderAsUObject()

virtual UObject * FLinkerPlaceholderBase::GetPlaceholderAsUObject ( ) const

virtual

Some of our internal validation checks rely on UObject compares (between this placeholder and other values). Since it is expected that this is sub-classed by a UObject, then we provide it this pure-virtual for the sub-class to implement (and return itself).

Returns

This as a UObject (null unless overridden by a sub-class). Checks to see if ResolveAllPlaceholderReferences() has been called on this placeholder.

True if ResolveAllPlaceholderReferences() has been called, otherwise false.

GetSubobjectPlaceholders()

TArray< ULinkerPlaceholderExportObject * > & FLinkerPlaceholderBase::GetSubobjectPlaceholders ( )

inline

Returns the list of subobjects that are waiting for this placeholder

HasBeenFullyResolved()

bool FLinkerPlaceholderBase::HasBeenFullyResolved

(

)

const

Checks to see if 1) this placeholder has had ResolveAllPlaceholderReferences() called on it, and 2) it doesn't have any more references that have since been added.

Returns

True if ResolveAllPlaceholderReferences() has been ran, and no KNOWN references have been added since.

HasKnownReferences()

bool FLinkerPlaceholderBase::HasKnownReferences ( ) const

virtual

A query method that let's us check to see if this class is currently being referenced by anything (if this returns false, then a referencing property could have forgotten to add itself... or, we've replaced all references).

Returns

True if this has anything stored in its ReferencingProperties container, otherwise false.

Reimplemented in TLinkerImportPlaceholder< PlaceholderType >, TLinkerImportPlaceholder< UClass >, and TLinkerImportPlaceholder< UFunction >.

IsDeferredSubobject()

bool FLinkerPlaceholderBase::IsDeferredSubobject ( ) const

inline

Returns true if this is a deferred subobject (implying the owner will resolve it)

MarkAsResolved()

void FLinkerPlaceholderBase::MarkAsResolved ( )

protected

Flags this placeholder as resolved (so that IsMarkedResolved() and HasBeenFullyResolved() can return true).

ResolveAllPlaceholderReferences()

int32 FLinkerPlaceholderBase::ResolveAllPlaceholderReferences ( UObject *  ReplacementObj )

virtual

Iterates over all known referencers and attempts to replace their references to this with a new (hopefully proper) UObject.

Parameters

ReplacementObj

The object that you want all references to this replaced with.

Returns

The number of references that were successfully replaced.

Reimplemented in TLinkerImportPlaceholder< PlaceholderType >, TLinkerImportPlaceholder< UClass >, and TLinkerImportPlaceholder< UFunction >.

SetupPlaceholderSubobject()

void FLinkerPlaceholderBase::SetupPlaceholderSubobject

(

ULinkerPlaceholderExportObject *

PlaceholderSubobject

)

Friends And Related Symbol Documentation

FLinkerPlaceholderObjectImpl

friend class FLinkerPlaceholderObjectImpl

friend

Member Data Documentation

DeferredObjectType

TWeakObjectPtr<const UClass> FLinkerPlaceholderBase::DeferredObjectType

Also set by the ULinkerLoad that created this instance; keeps track of the type of the original object whose load is being deferred.

PackageIndex

FPackageIndex FLinkerPlaceholderBase::PackageIndex

Set by the ULinkerLoad that created this instance, tracks what import/export this was used in place of.

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The documentation for this class was generated from the following files:

• Engine/Source/Runtime/CoreUObject/Private/UObject/LinkerPlaceholderBase.h
• Engine/Source/Runtime/CoreUObject/Private/UObject/LinkerPlaceholderBase.cpp