static void GrowMemory(ref WorldAllocator storage, int newElementCapacity)
{
if (storage.elementAllocationCapacity < 0)
{
throw new InvalidOperationException();
}
long extraBytes = UnsafeUtility.SizeOf <RLEElement>() * (newElementCapacity - storage.elementAllocationCapacity);
long newBytes = UnsafeUtility.SizeOf <RLEColumn>() * (long)storage.columnCount;
newBytes += UnsafeUtility.SizeOf <RLEElement>() * (long)newElementCapacity;
void *newPointer = UnsafeUtility.Malloc(newBytes, UnsafeUtility.AlignOf <RLEColumn>(), Allocator.Persistent);
if (storage.pointer == null)
{
UnsafeUtility.MemClear(newPointer, newBytes);
}
else
{
UnsafeUtility.MemCpy(newPointer, storage.pointer, newBytes - extraBytes);
UnsafeUtility.MemClear((byte *)newPointer + newBytes - extraBytes, extraBytes);
UnsafeUtility.Free(storage.pointer, Allocator.Persistent);
}
storage.pointer = newPointer;
storage.elementAllocationCapacity = newElementCapacity;
storage.elementsStart = storage.GetColumnPointer(storage.columnCount);
}
public static WorldAllocator Allocate(int columnCount, void *data)
{
WorldAllocator storage = new WorldAllocator();
storage.columnCount = columnCount;
storage.allocationLock = new System.Threading.SpinLock(false);
storage.pointer = data;
storage.elementsStart = storage.GetColumnPointer(storage.columnCount);
storage.elementAllocationCapacity = -1;
return(storage);
}