186 lines
7.0 KiB
C++
186 lines
7.0 KiB
C++
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// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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LazyObjectPtr.cpp: Guid-based lazy pointer to UObject
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=============================================================================*/
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#include "UObject/LazyObjectPtr.h"
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#include "Misc/CommandLine.h"
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#include "Misc/App.h"
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#include "UObject/Package.h"
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#include "UObject/PropertyPortFlags.h"
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#include "UObject/UObjectAnnotation.h"
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/** Annotation associating objects with their guids **/
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static FUObjectAnnotationSparseSearchable<FUniqueObjectGuid, true> GuidAnnotation;
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#define MAX_PIE_INSTANCES 10
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static TMap<FGuid, FGuid> PIEGuidMap[MAX_PIE_INSTANCES];
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/*-----------------------------------------------------------------------------
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FUniqueObjectGuid
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-----------------------------------------------------------------------------*/
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FUniqueObjectGuid::FUniqueObjectGuid(const class UObject* InObject)
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: Guid(GuidAnnotation.GetAnnotation(InObject).Guid)
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{
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}
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FUniqueObjectGuid FUniqueObjectGuid::FixupForPIE(int32 PlayInEditorID) const
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{
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FUniqueObjectGuid Temp(*this);
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check(PlayInEditorID != -1)
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const FGuid* FoundGuid = PIEGuidMap[PlayInEditorID % MAX_PIE_INSTANCES].Find(Temp.GetGuid());
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if (FoundGuid)
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{
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Temp = *FoundGuid;
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}
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return Temp;
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}
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UObject* FUniqueObjectGuid::ResolveObject() const
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{
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UObject* Result = GuidAnnotation.Find(*this);
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return Result;
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}
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FString FUniqueObjectGuid::ToString() const
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{
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return Guid.ToString(EGuidFormats::UniqueObjectGuid);
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}
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void FUniqueObjectGuid::FromString(const FString& From)
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{
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TArray<FString> Split;
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Split.Empty(4);
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if (From.ParseIntoArray(Split, TEXT("-"), false) == 4)
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{
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Guid.A = FParse::HexNumber(*Split[0]);
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Guid.B = FParse::HexNumber(*Split[1]);
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Guid.C = FParse::HexNumber(*Split[2]);
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Guid.D = FParse::HexNumber(*Split[3]);
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}
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else
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{
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Guid.Invalidate();
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}
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}
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FUniqueObjectGuid FUniqueObjectGuid::GetOrCreateIDForObject(const class UObject* Object)
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{
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check(Object);
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checkSlow(IsInGameThread());
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FUniqueObjectGuid ObjectGuid(Object);
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if (!ObjectGuid.IsValid())
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{
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#if WITH_EDITOR
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if (GIsCookerLoadingPackage)
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{
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UE_ASSET_LOG(LogUObjectGlobals, Warning, Object, TEXT("Creating a new object GUID for object '%s' during cooking - this asset should be resaved"), *Object->GetFullName());
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}
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#endif
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ObjectGuid.Guid = FGuid::NewGuid();
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GuidAnnotation.AddAnnotation(Object, ObjectGuid);
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Object->MarkPackageDirty();
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}
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return ObjectGuid;
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}
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FThreadSafeCounter FUniqueObjectGuid::CurrentAnnotationTag(1);
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/*-----------------------------------------------------------------------------------------------------------
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FLazyObjectPtr
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-------------------------------------------------------------------------------------------------------------*/
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void FLazyObjectPtr::PossiblySerializeObjectGuid(UObject* Object, FStructuredArchive::FRecord Record)
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{
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FArchive& UnderlyingArchive = Record.GetUnderlyingArchive();
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if (UnderlyingArchive.IsSaving() || UnderlyingArchive.IsCountingMemory())
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{
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FUniqueObjectGuid Guid = GuidAnnotation.GetAnnotation(Object);
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TOptional<FStructuredArchiveSlot> GuidSlot = Record.TryEnterField(SA_FIELD_NAME(TEXT("Guid")), Guid.IsValid());
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if (GuidSlot.IsSet())
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{
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if (UnderlyingArchive.GetPortFlags() & PPF_DuplicateForPIE)
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{
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check(GPlayInEditorID != -1);
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FGuid& FoundGuid = PIEGuidMap[GPlayInEditorID % MAX_PIE_INSTANCES].FindOrAdd(Guid.GetGuid());
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if (!FoundGuid.IsValid())
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{
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Guid = FoundGuid = FGuid::NewGuid();
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}
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else
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{
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Guid = FoundGuid;
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}
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}
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GuidSlot.GetValue() << Guid;
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}
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}
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else if (UnderlyingArchive.IsLoading())
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{
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TOptional<FStructuredArchiveSlot> GuidSlot = Record.TryEnterField(SA_FIELD_NAME(TEXT("Guid")), false);
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if (GuidSlot.IsSet())
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{
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FUniqueObjectGuid Guid;
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GuidSlot.GetValue() << Guid;
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// Don't try and resolve GUIDs when loading a package for diffing
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const UPackage* Package = Object->GetOutermost();
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const bool bLoadedForDiff = Package->HasAnyPackageFlags(PKG_ForDiffing);
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if (!bLoadedForDiff && (!(UnderlyingArchive.GetPortFlags() & PPF_Duplicate) || (UnderlyingArchive.GetPortFlags() & PPF_DuplicateForPIE)))
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{
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check(!Guid.IsDefault());
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UObject* OtherObject = Guid.ResolveObject();
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if (OtherObject != Object) // on undo/redo, the object (potentially) already exists
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{
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const bool bDuplicate = OtherObject != nullptr;
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const bool bReassigning = FParse::Param(FCommandLine::Get(), TEXT("AssignNewMapGuids"));
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if (bDuplicate || bReassigning)
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{
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if (!bReassigning && OtherObject && OtherObject->HasAnyFlags(RF_NewerVersionExists))
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{
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GuidAnnotation.RemoveAnnotation(OtherObject);
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GuidAnnotation.AddAnnotation(Object, Guid);
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}
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else
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{
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if (!bReassigning)
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{
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// Always warn for non-map packages, skip map packages in PIE or game
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const bool bInGame = FApp::IsGame() || Package->HasAnyPackageFlags(PKG_PlayInEditor);
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UE_CLOG(!Package->ContainsMap() || !bInGame, LogUObjectGlobals, Warning,
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TEXT("Guid referenced by %s is already used by %s, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE"),
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*Object->GetFullName(), *OtherObject->GetFullName());
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}
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else
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{
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UE_LOG(LogUObjectGlobals, Warning, TEXT("Assigning new Guid to %s"), *Object->GetFullName());
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}
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// This guid is in use, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE. If so give it an invalid GUID and don't add to the annotation map.
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Guid = FGuid();
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}
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}
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else
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{
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GuidAnnotation.AddAnnotation(Object, Guid);
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}
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FUniqueObjectGuid::InvalidateTag();
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}
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}
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}
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}
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}
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void FLazyObjectPtr::ResetPIEFixups()
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{
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check(GPlayInEditorID != -1);
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PIEGuidMap[GPlayInEditorID % MAX_PIE_INSTANCES].Reset();
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}
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