void FUObjectArray::CloseDisregardForGC()
{
check(IsInGameThread());
check(OpenForDisregardForGC);
// Iterate over all class objects and force the default objects to be created. Additionally also
// assembles the token reference stream at this point. This is required for class objects that are
// not taken into account for garbage collection but have instances that are.
// Workaround for Visual Studio 2013 analyzer bug. Using a temporary directly in the range-for
// errors if the analyzer is enabled.
TObjectRange<UClass> Range;
for (UClass* Class : Range)
{
// Force the default object to be created.
Class->GetDefaultObject(); // Force the default object to be constructed if it isn't already
// Assemble reference token stream for garbage collection/ RTGC.
if (!Class->HasAnyClassFlags(CLASS_TokenStreamAssembled))
{
Class->AssembleReferenceTokenStream();
}
}
if (GIsInitialLoad)
{
// Iterate over all objects and mark them to be part of root set.
int32 NumAlwaysLoadedObjects = 0;
int32 NumRootObjects = 0;
for (FObjectIterator It; It; ++It)
{
UObject* Object = *It;
if (Object->IsSafeForRootSet())
{
NumRootObjects++;
Object->AddToRoot();
}
else if (Object->IsRooted())
{
Object->RemoveFromRoot();
}
NumAlwaysLoadedObjects++;
}
UE_LOG(LogUObjectArray, Log, TEXT("%i objects as part of root set at end of initial load."), NumAlwaysLoadedObjects);
if (GUObjectArray.DisregardForGCEnabled())
{
UE_LOG(LogUObjectArray, Log, TEXT("%i objects are not in the root set, but can never be destroyed because they are in the DisregardForGC set."), NumAlwaysLoadedObjects - NumRootObjects);
}
// When disregard for GC pool is closed for the first time, make sure the first GC index is set after the last non-GC index.
// We do allow here for some slack if MaxObjectsNotConsideredByGC > (ObjLastNonGCIndex + 1) so that disregard for GC pool
// can be re-opened later.
ObjFirstGCIndex = FMath::Max(ObjFirstGCIndex, ObjLastNonGCIndex + 1);
GUObjectAllocator.BootMessage();
}
UE_LOG(LogUObjectArray, Log, TEXT("CloseDisregardForGC: %d/%d objects in disregard for GC pool"), ObjLastNonGCIndex + 1, MaxObjectsNotConsideredByGC);
OpenForDisregardForGC = false;
GIsInitialLoad = false;
}
