public static TypeLayout GetLayout(Type type, TypeLayoutCache cache = null, bool includePaddings = true)
{
if (cache != null && cache.LayoutCache.TryGetValue(type, out var result))
{
return(result);
}
try
{
result = DoGetLayout();
cache?.LayoutCache.TryAdd(type, result);
return(result);
}
catch
{
Console.WriteLine($"Failed to create an instance of type {type}");
throw;
}
TypeLayout DoGetLayout()
{
var(size, overhead) = InspectorHelper.GetSize(type);
var fieldsOffsets = InspectorHelper.GetFieldOffsets(type);
var fields = new List <FieldLayoutBase>();
if (includePaddings && fieldsOffsets.Length != 0 && fieldsOffsets[0].offset != 0)
{
fields.Add(new Padding(fieldsOffsets[0].offset, 0));
}
for (var index = 0; index < fieldsOffsets.Length; index++)
{
var fieldOffset = fieldsOffsets[index];
var fieldInfo = new FieldLayout(fieldOffset.offset, fieldOffset.fieldInfo);
fields.Add(fieldInfo);
if (includePaddings)
{
int nextOffsetOrSize = size;
if (index != fieldsOffsets.Length - 1)
{
// This is not a last field.
nextOffsetOrSize = fieldsOffsets[index + 1].offset;
}
var nextSectionOffsetCandidate = fieldInfo.Offset + fieldInfo.Size;
if (nextSectionOffsetCandidate < nextOffsetOrSize)
{
// we have padding
fields.Add(new Padding(nextOffsetOrSize - nextSectionOffsetCandidate, nextSectionOffsetCandidate));
}
}
}
return(new TypeLayout(type, size, overhead, fields.ToArray(), cache));
}
}
public FieldLayout(int offset, FieldInfo fieldInfo)
: base(InspectorHelper.GetFieldSize(fieldInfo.FieldType), offset)
{
FieldInfo = fieldInfo;
}
