public override ClassLayoutMetadata GetClassLayout()
{
ClassLayoutMetadata layout = ManagedStructType.GetClassLayout();
ClassLayoutMetadata result;
result.PackingSize = layout.PackingSize;
result.Size = layout.Size;
if (IsExplicitLayout)
{
result.Offsets = new FieldAndOffset[layout.Offsets.Length];
Debug.Assert(layout.Offsets.Length <= _fields.Length);
int layoutIndex = 0;
for (int index = 0; index < _fields.Length; index++)
{
if (_fields[index].Name == layout.Offsets[layoutIndex].Field.Name)
{
result.Offsets[layoutIndex] = new FieldAndOffset(_fields[index], layout.Offsets[layoutIndex].Offset);
layoutIndex++;
}
}
Debug.Assert(layoutIndex == layout.Offsets.Length);
}
else
{
result.Offsets = null;
}
return(result);
}
public override ClassLayoutMetadata GetClassLayout()
{
ClassLayoutMetadata result = new ClassLayoutMetadata();
result.PackingSize = 0;
result.Size = checked ((int)Length * ElementType.GetElementSize().AsInt);
return(result);
}
private void OutputTypeFields(CppGenerationBuffer sb, TypeDesc t)
{
bool explicitLayout = false;
ClassLayoutMetadata classLayoutMetadata = default(ClassLayoutMetadata);
if (t.IsValueType)
{
MetadataType metadataType = (MetadataType)t;
if (metadataType.IsExplicitLayout)
{
explicitLayout = true;
classLayoutMetadata = metadataType.GetClassLayout();
}
}
int instanceFieldIndex = 0;
if (explicitLayout)
{
sb.AppendLine();
sb.Append("union {");
sb.Indent();
}
foreach (var field in t.GetFields())
{
if (field.IsStatic)
{
if (field.IsLiteral)
{
continue;
}
TypeDesc fieldType = GetFieldTypeOrPlaceholder(field);
CppGenerationBuffer builder;
if (!fieldType.IsValueType)
{
builder = _gcStatics;
}
else
{
// TODO: Valuetype statics with GC references
builder = _statics;
}
builder.AppendLine();
builder.Append(GetCppSignatureTypeName(fieldType));
builder.Append(" ");
builder.Append(GetCppStaticFieldName(field) + ";");
}
else
{
if (explicitLayout)
{
sb.AppendLine();
sb.Append("struct {");
sb.Indent();
int offset = classLayoutMetadata.Offsets[instanceFieldIndex].Offset;
if (offset > 0)
{
sb.AppendLine();
sb.Append("char __pad" + instanceFieldIndex + "[" + offset + "];");
}
}
sb.AppendLine();
sb.Append(GetCppSignatureTypeName(GetFieldTypeOrPlaceholder(field)) + " " + GetCppFieldName(field) + ";");
if (explicitLayout)
{
sb.Exdent();
sb.AppendLine();
sb.Append("};");
}
instanceFieldIndex++;
}
}
if (explicitLayout)
{
sb.Exdent();
sb.AppendLine();
sb.Append("};");
}
}
