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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.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Runtime.CompilerServices;
using Internal.Runtime.Augments;
using Internal.Runtime.CompilerServices;
using Internal.Reflection.Augments;
namespace System
{
[StructLayout(LayoutKind.Sequential)]
public struct RuntimeMethodHandle : ISerializable
{
private IntPtr _value;
public unsafe IntPtr Value => _value;
public override bool Equals(object obj)
{
if (!(obj is RuntimeMethodHandle))
return false;
return Equals((RuntimeMethodHandle)obj);
}
public bool Equals(RuntimeMethodHandle handle)
{
if (_value == handle._value)
return true;
if (_value == IntPtr.Zero || handle._value == IntPtr.Zero)
return false;
RuntimeTypeHandle declaringType1, declaringType2;
MethodNameAndSignature nameAndSignature1, nameAndSignature2;
RuntimeTypeHandle[] genericArgs1, genericArgs2;
RuntimeAugments.TypeLoaderCallbacks.GetRuntimeMethodHandleComponents(this, out declaringType1, out nameAndSignature1, out genericArgs1);
RuntimeAugments.TypeLoaderCallbacks.GetRuntimeMethodHandleComponents(handle, out declaringType2, out nameAndSignature2, out genericArgs2);
if (!declaringType1.Equals(declaringType2))
return false;
if (!nameAndSignature1.Equals(nameAndSignature2))
return false;
if ((genericArgs1 == null && genericArgs2 != null) || (genericArgs1 != null && genericArgs2 == null))
return false;
if (genericArgs1 != null)
{
if (genericArgs1.Length != genericArgs2.Length)
return false;
for (int i = 0; i < genericArgs1.Length; i++)
{
if (!genericArgs1[i].Equals(genericArgs2[i]))
return false;
}
}
return true;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private int _rotl(int value, int shift)
{
return (int)(((uint)value << shift) | ((uint)value >> (32 - shift)));
}
public override int GetHashCode()
{
if (_value == IntPtr.Zero)
return 0;
RuntimeTypeHandle declaringType;
MethodNameAndSignature nameAndSignature;
RuntimeTypeHandle[] genericArgs;
RuntimeAugments.TypeLoaderCallbacks.GetRuntimeMethodHandleComponents(this, out declaringType, out nameAndSignature, out genericArgs);
int hashcode = declaringType.GetHashCode();
hashcode = (hashcode + _rotl(hashcode, 13)) ^ nameAndSignature.Name.GetHashCode();
if (genericArgs != null)
{
for (int i = 0; i < genericArgs.Length; i++)
{
int argumentHashCode = genericArgs[i].GetHashCode();
hashcode = (hashcode + _rotl(hashcode, 13)) ^ argumentHashCode;
}
}
return hashcode;
}
public static bool operator ==(RuntimeMethodHandle left, RuntimeMethodHandle right)
{
return left.Equals(right);
}
public static bool operator !=(RuntimeMethodHandle left, RuntimeMethodHandle right)
{
return !left.Equals(right);
}
public IntPtr GetFunctionPointer()
{
RuntimeTypeHandle declaringType;
MethodNameAndSignature nameAndSignature;
RuntimeTypeHandle[] genericArgs;
RuntimeAugments.TypeLoaderCallbacks.GetRuntimeMethodHandleComponents(this, out declaringType, out nameAndSignature, out genericArgs);
return ReflectionAugments.ReflectionCoreCallbacks.GetFunctionPointer(this, declaringType);
}
public void GetObjectData(SerializationInfo info, StreamingContext context)
{
throw new PlatformNotSupportedException();
}
}
}
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