///////////////////////////////////////////////////////////////////////
// Listings 13-79, 13-81
static void Main(string[] args)
{
Console.WriteLine(sizeof(Test1));
Console.WriteLine(sizeof(Test2));
//Console.WriteLine(sizeof(Test1o));
//Console.WriteLine(sizeof(Test2o));
Console.WriteLine(Unsafe.SizeOf <Test3>());
Console.WriteLine(Unsafe.SizeOf <Test4>());
TypeLayout.PrintLayout <SomeClass>();
TypeLayout layout = TypeLayout.GetLayout <AlignedDouble>();
Console.WriteLine($"Total size {layout.FullSize}B with {layout.Paddings}B padding.");
foreach (var fieldBase in layout.Fields)
{
switch (fieldBase)
{
case FieldLayout field: Console.WriteLine($"{field.Offset} {field.Size} {field.FieldInfo.Name}"); break;
case Padding padding: Console.WriteLine($"{padding.Offset} {padding.Size} Padding"); break;
}
}
//TypeLayout.PrintLayout<UnalignedDoubleExplicit>();
//var o = new AlignedDouble();
//Console.ReadLine();
//GC.KeepAlive(o);
Console.ReadLine();
}
void AssertSize <T>(int expectedSize)
{
Assert.Equal(expectedSize, Unsafe.SizeOf <T>());
Assert.Equal(expectedSize, Marshal.SizeOf <T>());
var layout = TypeLayout.GetLayout <T>();
// check that fields are aligned
foreach (var field in layout.Fields)
{
if ($"{field}".Contains("padding"))
{
continue;
}
Assert.True(field.Offset % field.Size == 0, $"Field {field} is not aligned");
}
// check that fields don't overlap
var minOffset = 0;
foreach (var field in layout.Fields)
{
Assert.True(field.Offset >= minOffset, $"Field {field.Offset} overlaps");
minOffset = field.Offset + field.Size;
}
// note that we aren't checking whether fields are efficiently arranged...
// also not currently checking if the whole struct is correctly aligned, only the fields within.
}
public void Nullable()
{
TypeLayout.PrintLayout <Nullable <bool> >();
var typeLayout = TypeLayout.GetLayout <Nullable <bool> >(includePaddings: true);
Assert.AreEqual(Unsafe.SizeOf <Nullable <bool> >(), typeLayout.Size);
}
public void UnsafeStructHasEmptyPaddings()
{
AssertNonRecursiveWithPadding <WithNestedUnsafeStruct>();
var typeLayout = TypeLayout.GetLayout <WithNestedUnsafeStruct>(includePaddings: true);
Assert.That(typeLayout.Paddings, Is.EqualTo(0));
}
public void PrivateMemoryLayout()
{
TypeLayout.PrintLayout <PrivateMemory <long> >(recursively: false);
TypeLayout.PrintLayout <PrivateMemory <byte> >(recursively: false);
TypeLayout.PrintLayout <PrivateMemory <object> >(recursively: false);
var layout = TypeLayout.GetLayout <PrivateMemory <long> >();
}
public void NullableLongByteStruct()
{
TypeLayout.PrintLayout <Nullable <LongByteStruct> >();
var typeLayout = TypeLayout.GetLayout <Nullable <LongByteStruct> >(includePaddings: true);
var size = Unsafe.SizeOf <Nullable <LongByteStruct> >();
Assert.AreEqual(typeLayout.Size, size);
}
public void LayoutForInstanceWithStringShouldNotCrash()
{
// I know, I know. This is bad to name tests like this. But this is life:)
var layout = TypeLayout.GetLayout <WithString>();
Assert.That(layout.Fields.Length, Is.EqualTo(1));
Assert.That(layout.Paddings, Is.EqualTo(0));
}
protected void AssertNonRecursiveWithPadding <T>() where T : struct
{
TypeLayout.PrintLayout <T>();
var structLayout = UnsafeLayout.GetLayout <T>(recursive: false);
var typeLayout = TypeLayout.GetLayout <T>(includePaddings: true);
CollectionAssert.AreEquivalent(typeLayout.Fields, structLayout);
Assert.AreEqual(Unsafe.SizeOf <T>(), typeLayout.Size);
}
public void Print_WithVolatile()
{
AssertNonRecursive <WithVolatile>();
TypeLayout.PrintLayout <WithVolatile>();
var typeLayout = TypeLayout.GetLayout <WithVolatile>();
Assert.That(typeLayout.FullSize, Is.EqualTo(16));
}
public void Print_WithVolatile()
{
Console.WriteLine(Marshal.SizeOf <WithVolatile>());
TypeLayout.PrintLayout <WithVolatile>();
var layout = TypeLayout.GetLayout <WithVolatile>();
Assert.That(layout.FullSize, Is.EqualTo(16));
}
public void PrintClassMultipleByteWrappersLayout()
{
// In this case every field aligned on the pointer boundaries
TypeLayout.PrintLayout <StructWithAutomaticLayout>();
Assert.That(TypeLayout.GetLayout <StructWithAutomaticLayout>().Size, Is.EqualTo(24));
}
public void FixedBytesNoPadding()
{
var typeLayout = TypeLayout.GetLayout <FixedBytes>(includePaddings: true);
Assert.That(typeLayout.Paddings, Is.EqualTo(0));
}
public void InspectLayout(Type t)
{
var layout = TypeLayout.GetLayout(t);
_output.WriteLine(layout.ToString(recursively: false));
}
public void TypeLayoutPaddingsStruct()
{
TypeLayout.GetLayout <VeryVeryComplexStruct>(includePaddings: true);
}
public void InspectLayout(Type t)
{
var layout = TypeLayout.GetLayout(t);
_output.WriteLine($"{layout}");
}
public void TypeLayoutStruct()
{
TypeLayout.GetLayout <VeryVeryComplexStruct>();
}
public void NoFieldsForEmptyClass()
{
var layout = TypeLayout.GetLayout <EmptyClass>();
Assert.That(layout.Fields, Is.Empty);
}
public void SizeForEmptyClassIs3PtrSizes()
{
var layout = TypeLayout.GetLayout <EmptyClass>();
Assert.That(layout.FullSize, Is.EqualTo(IntPtr.Size * 3));
}
static SimpleObject()
{
SimpleObject.TypeLayout = TypeLayout.GetLayout <SimpleObject>();
}
public void UnsafeStructHasEmptyPaddings()
{
var typeLayout = TypeLayout.GetLayout <WithNestedUnsafeStruct>();
Assert.That(typeLayout.Paddings, Is.EqualTo(0));
}
public void PrintStructMultipleByteWrappersLayout()
{
// If the layout is sequential, then structs are aligned properly with no paddings
TypeLayout.PrintLayout <StructMultipleByteWrappers>();
Assert.That(TypeLayout.GetLayout <StructMultipleByteWrappers>().Size, Is.EqualTo(3));
}