|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.CodeAnalysis;
namespace Microsoft.Interop
{
/// <summary>
/// Marshalling information provider for unmanaged types that may be blittable.
/// </summary>
public sealed class BlittableTypeMarshallingInfoProvider : ITypeBasedMarshallingInfoProvider
{
private readonly Compilation _compilation;
public BlittableTypeMarshallingInfoProvider(Compilation compilation)
{
_compilation = compilation;
}
public bool CanProvideMarshallingInfoForType(ITypeSymbol type) => type is INamedTypeSymbol { IsUnmanagedType: true } unmanagedType
&& unmanagedType.IsConsideredBlittable();
public MarshallingInfo GetMarshallingInfo(ITypeSymbol type, int indirectionDepth, UseSiteAttributeProvider useSiteAttributes, GetMarshallingInfoCallback marshallingInfoCallback)
{
if (type.TypeKind is TypeKind.Enum or TypeKind.Pointer or TypeKind.FunctionPointer
|| type.SpecialType.IsAlwaysBlittable())
{
// Treat primitive types and enums as having no marshalling info.
// They are supported in configurations where runtime marshalling is enabled.
return NoMarshallingInfo.Instance;
}
else
{
return new UnmanagedBlittableMarshallingInfo(type.IsStrictlyBlittableInContext(_compilation));
}
}
}
}
|