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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Diagnostics;
using System.Runtime.Serialization;
namespace System.Reflection
{
[Serializable]
[CLSCompliant(false)]
public sealed unsafe class Pointer : ISerializable
{
// CoreCLR: Do not add or remove fields without updating the ReflectionPointer class in runtimehandles.h
private readonly void* _ptr;
private readonly Type _ptrType;
private Pointer(void* ptr, Type ptrType)
{
Debug.Assert(ptrType.IsRuntimeImplemented()); // CoreCLR: For CoreRT's sake, _ptrType has to be declared as "Type", but in fact, it is always a RuntimeType. Code on CoreCLR expects this.
_ptr = ptr;
_ptrType = ptrType;
}
private Pointer(SerializationInfo info, StreamingContext context)
{
_ptr = ((IntPtr)(info.GetValue("_ptr", typeof(IntPtr)))).ToPointer();
_ptrType = (Type)info.GetValue("_ptrType", typeof(Type));
if (!_ptrType.IsRuntimeImplemented())
throw new SerializationException(SR.Arg_MustBeType);
}
public static object Box(void* ptr, Type type)
{
if (type == null)
throw new ArgumentNullException(nameof(type));
if (!type.IsPointer)
throw new ArgumentException(SR.Arg_MustBePointer, nameof(ptr));
if (!type.IsRuntimeImplemented())
throw new ArgumentException(SR.Arg_MustBeType, nameof(ptr));
return new Pointer(ptr, type);
}
public static void* Unbox(object ptr)
{
if (!(ptr is Pointer))
throw new ArgumentException(SR.Arg_MustBePointer, nameof(ptr));
return ((Pointer)ptr)._ptr;
}
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("_ptr", new IntPtr(_ptr));
info.AddValue("_ptrType", _ptrType);
}
internal Type GetPointerType() => _ptrType;
internal object GetPointerValue() => (IntPtr)_ptr;
}
}
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