RuntimeFieldHandle.cs

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using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.Serialization;
using System.Runtime.Versioning;
 
namespace System;
 
[NonVersionable]
public struct RuntimeFieldHandle : ISerializable
{
    private readonly IRuntimeFieldInfo m_ptr;
 
    public IntPtr Value
    {
        get
        {
            if (m_ptr == null)
            {
                return IntPtr.Zero;
            }
            return m_ptr.Value.Value;
        }
    }
 
    internal RuntimeFieldHandle(IRuntimeFieldInfo fieldInfo)
    {
        m_ptr = fieldInfo;
    }
 
    internal IRuntimeFieldInfo GetRuntimeFieldInfo()
    {
        return m_ptr;
    }
 
    internal bool IsNullHandle()
    {
        return m_ptr == null;
    }
 
    public override int GetHashCode()
    {
        return ValueType.GetHashCodeOfPtr(Value);
    }
 
    public override bool Equals(object? obj)
    {
        if (!(obj is RuntimeFieldHandle runtimeFieldHandle))
        {
            return false;
        }
        return runtimeFieldHandle.Value == Value;
    }
 
    public bool Equals(RuntimeFieldHandle handle)
    {
        return handle.Value == Value;
    }
 
    public static bool operator ==(RuntimeFieldHandle left, RuntimeFieldHandle right)
    {
        return left.Equals(right);
    }
 
    public static bool operator !=(RuntimeFieldHandle left, RuntimeFieldHandle right)
    {
        return !left.Equals(right);
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern string GetName(RtFieldInfo field);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    private unsafe static extern void* _GetUtf8Name(RuntimeFieldHandleInternal field);
 
    internal unsafe static MdUtf8String GetUtf8Name(RuntimeFieldHandleInternal field)
    {
        return new MdUtf8String(_GetUtf8Name(field));
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern bool MatchesNameHash(RuntimeFieldHandleInternal handle, uint hash);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern FieldAttributes GetAttributes(RuntimeFieldHandleInternal field);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern RuntimeType GetApproxDeclaringType(RuntimeFieldHandleInternal field);
 
    internal static RuntimeType GetApproxDeclaringType(IRuntimeFieldInfo field)
    {
        RuntimeType approxDeclaringType = GetApproxDeclaringType(field.Value);
        GC.KeepAlive(field);
        return approxDeclaringType;
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern int GetToken(RtFieldInfo field);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern object GetValue(RtFieldInfo field, object instance, RuntimeType fieldType, RuntimeType declaringType, ref bool domainInitialized);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal unsafe static extern object GetValueDirect(RtFieldInfo field, RuntimeType fieldType, void* pTypedRef, RuntimeType contextType);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void SetValue(RtFieldInfo field, object obj, object value, RuntimeType fieldType, FieldAttributes fieldAttr, RuntimeType declaringType, ref bool domainInitialized);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal unsafe static extern void SetValueDirect(RtFieldInfo field, RuntimeType fieldType, void* pTypedRef, object value, RuntimeType contextType);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern RuntimeFieldHandleInternal GetStaticFieldForGenericType(RuntimeFieldHandleInternal field, RuntimeType declaringType);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern bool AcquiresContextFromThis(RuntimeFieldHandleInternal field);
 
    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        throw new PlatformNotSupportedException();
    }
}