public Archetype *GetOrCreateArchetype(ComponentTypeInArchetype *types, int count,
EntityGroupManager groupManager)
{
var type = GetExistingArchetype(types, count);
if (type != null)
{
return(type);
}
AssertArchetypeComponents(types, count);
// This is a new archetype, allocate it and add it to the hash map
type = (Archetype *)m_ArchetypeChunkAllocator.Allocate(sizeof(Archetype), 8);
type->TypesCount = count;
type->Types =
(ComponentTypeInArchetype *)m_ArchetypeChunkAllocator.Construct(
sizeof(ComponentTypeInArchetype) * count, 4, types);
type->EntityCount = 0;
type->ChunkCount = 0;
type->NumSharedComponents = 0;
type->SharedComponentOffset = null;
var disabledTypeIndex = TypeManager.GetTypeIndex <Disabled>();
type->Disabled = false;
for (var i = 0; i < count; ++i)
{
if (TypeManager.GetComponentType(types[i].TypeIndex).Category == TypeManager.TypeCategory.ISharedComponentData)
{
++type->NumSharedComponents;
}
if (types[i].TypeIndex == disabledTypeIndex)
{
type->Disabled = true;
}
}
// Compute how many IComponentData types store Entities and need to be patched.
// Types can have more than one entity, which means that this count is not necessarily
// the same as the type count.
int scalarEntityPatchCount = 0;
int bufferEntityPatchCount = 0;
for (var i = 0; i < count; ++i)
{
var ct = TypeManager.GetComponentType(types[i].TypeIndex);
var entityOffsets = ct.EntityOffsets;
if (entityOffsets == null)
{
continue;
}
if (ct.BufferCapacity >= 0)
{
bufferEntityPatchCount += entityOffsets.Length;
}
else
{
scalarEntityPatchCount += entityOffsets.Length;
}
}
var chunkDataSize = Chunk.GetChunkBufferSize(type->TypesCount, type->NumSharedComponents);
// FIXME: proper alignment
type->Offsets = (int *)m_ArchetypeChunkAllocator.Allocate(sizeof(int) * count, 4);
type->SizeOfs = (int *)m_ArchetypeChunkAllocator.Allocate(sizeof(int) * count, 4);
type->TypeMemoryOrder = (int *)m_ArchetypeChunkAllocator.Allocate(sizeof(int) * count, 4);
type->ScalarEntityPatches = (EntityRemapUtility.EntityPatchInfo *)m_ArchetypeChunkAllocator.Allocate(sizeof(EntityRemapUtility.EntityPatchInfo) * scalarEntityPatchCount, 4);
type->ScalarEntityPatchCount = scalarEntityPatchCount;
type->BufferEntityPatches = (EntityRemapUtility.BufferEntityPatchInfo *)m_ArchetypeChunkAllocator.Allocate(sizeof(EntityRemapUtility.BufferEntityPatchInfo) * bufferEntityPatchCount, 4);
type->BufferEntityPatchCount = bufferEntityPatchCount;
var bytesPerInstance = 0;
for (var i = 0; i < count; ++i)
{
var cType = TypeManager.GetComponentType(types[i].TypeIndex);
var sizeOf = cType.SizeInChunk; // Note that this includes internal capacity and header overhead for buffers.
type->SizeOfs[i] = sizeOf;
bytesPerInstance += sizeOf;
}
type->ChunkCapacity = chunkDataSize / bytesPerInstance;
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (bytesPerInstance > chunkDataSize)
{
throw new ArgumentException(
$"Entity archetype component data is too large. The maximum component data is {chunkDataSize} but the component data is {bytesPerInstance}");
}
Assert.IsTrue(Chunk.kMaximumEntitiesPerChunk >= type->ChunkCapacity);
#endif
// For serialization a stable ordering of the components in the
// chunk is desired. The type index is not stable, since it depends
// on the order in which types are added to the TypeManager.
// A permutation of the types ordered by a TypeManager-generated
// memory ordering is used instead.
var memoryOrderings = new NativeArray <UInt64>(count, Allocator.Temp);
for (int i = 0; i < count; ++i)
{
memoryOrderings[i] = TypeManager.GetComponentType(types[i].TypeIndex).MemoryOrdering;
}
for (int i = 0; i < count; ++i)
{
int index = i;
while (index > 1 && memoryOrderings[i] < memoryOrderings[type->TypeMemoryOrder[index - 1]])
{
type->TypeMemoryOrder[index] = type->TypeMemoryOrder[index - 1];
--index;
}
type->TypeMemoryOrder[index] = i;
}
memoryOrderings.Dispose();
var usedBytes = 0;
for (var i = 0; i < count; ++i)
{
var index = type->TypeMemoryOrder[i];
var sizeOf = type->SizeOfs[index];
type->Offsets[index] = usedBytes;
usedBytes += sizeOf * type->ChunkCapacity;
}
type->NumManagedArrays = 0;
type->ManagedArrayOffset = null;
for (var i = 0; i < count; ++i)
{
if (TypeManager.GetComponentType(types[i].TypeIndex).Category == TypeManager.TypeCategory.Class)
{
++type->NumManagedArrays;
}
}
if (type->NumManagedArrays > 0)
{
type->ManagedArrayOffset = (int *)m_ArchetypeChunkAllocator.Allocate(sizeof(int) * count, 4);
var mi = 0;
for (var i = 0; i < count; ++i)
{
var cType = TypeManager.GetComponentType(types[i].TypeIndex);
if (cType.Category == TypeManager.TypeCategory.Class)
{
type->ManagedArrayOffset[i] = mi++;
}
else
{
type->ManagedArrayOffset[i] = -1;
}
}
}
if (type->NumSharedComponents > 0)
{
type->SharedComponentOffset = (int *)m_ArchetypeChunkAllocator.Allocate(sizeof(int) * count, 4);
var mi = 0;
for (var i = 0; i < count; ++i)
{
var cType = TypeManager.GetComponentType(types[i].TypeIndex);
if (cType.Category == TypeManager.TypeCategory.ISharedComponentData)
{
type->SharedComponentOffset[i] = mi++;
}
else
{
type->SharedComponentOffset[i] = -1;
}
}
}
// Fill in arrays of scalar and buffer entity patches
var scalarPatchInfo = type->ScalarEntityPatches;
var bufferPatchInfo = type->BufferEntityPatches;
for (var i = 0; i != count; i++)
{
var ct = TypeManager.GetComponentType(types[i].TypeIndex);
var offsets = ct.EntityOffsets;
if (ct.BufferCapacity >= 0)
{
bufferPatchInfo = EntityRemapUtility.AppendBufferEntityPatches(bufferPatchInfo, offsets, type->Offsets[i], type->SizeOfs[i], ct.ElementSize);
}
else
{
scalarPatchInfo = EntityRemapUtility.AppendEntityPatches(scalarPatchInfo, offsets, type->Offsets[i], type->SizeOfs[i]);
}
}
type->ScalarEntityPatchCount = scalarEntityPatchCount;
type->BufferEntityPatchCount = bufferEntityPatchCount;
// Update the list of all created archetypes
type->PrevArchetype = m_LastArchetype;
m_LastArchetype = type;
UnsafeLinkedListNode.InitializeList(&type->ChunkList);
UnsafeLinkedListNode.InitializeList(&type->ChunkListWithEmptySlots);
type->FreeChunksBySharedComponents.Init(8);
m_TypeLookup.Add(GetHash(types, count), (IntPtr)type);
type->SystemStateCleanupComplete = ArchetypeSystemStateCleanupComplete(type);
type->SystemStateCleanupNeeded = ArchetypeSystemStateCleanupNeeded(type);
groupManager.OnArchetypeAdded(type);
return(type);
}