Pointer.cs

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using System.Diagnostics.CodeAnalysis;
using System.Runtime.Serialization;
 
namespace System.Reflection;
 
[CLSCompliant(false)]
public sealed class Pointer : ISerializable
{
    private unsafe readonly void* _ptr;
 
    private readonly Type _ptrType;
 
    private unsafe Pointer(void* ptr, Type ptrType)
    {
        _ptr = ptr;
        _ptrType = ptrType;
    }
 
    public unsafe static object Box(void* ptr, Type type)
    {
        if (type == null)
        {
            throw new ArgumentNullException("type");
        }
        if (!type.IsPointer)
        {
            throw new ArgumentException(SR.Arg_MustBePointer, "ptr");
        }
        if (!type.IsRuntimeImplemented())
        {
            throw new ArgumentException(SR.Arg_MustBeType, "ptr");
        }
        return new Pointer(ptr, type);
    }
 
    public unsafe static void* Unbox(object ptr)
    {
        if (!(ptr is Pointer))
        {
            throw new ArgumentException(SR.Arg_MustBePointer, "ptr");
        }
        return ((Pointer)ptr)._ptr;
    }
 
    public unsafe override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (obj is Pointer pointer)
        {
            return _ptr == pointer._ptr;
        }
        return false;
    }
 
    public unsafe override int GetHashCode()
    {
        UIntPtr ptr = (UIntPtr)_ptr;
        return ptr.GetHashCode();
    }
 
    void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
    {
        throw new PlatformNotSupportedException();
    }
 
    internal Type GetPointerType()
    {
        return _ptrType;
    }
 
    internal unsafe IntPtr GetPointerValue()
    {
        return (IntPtr)_ptr;
    }
}