Benchmarks for #115746 (davidwrighton) #424
Description
Processing dotnet/runtime#115746 (comment) command:
Command
-arm
using System;
using System.Runtime.InteropServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
namespace PInvokeBenchmark
{
public class PInvokeBenchmarks
{
// Define a delegate type for our managed function
private delegate int ManagedDelegate(bool value);
// Define a matching function pointer type for unmanaged calls
private unsafe delegate int UnmanagedDelegate(bool value);
// The managed implementation
private static int ManagedImplementation(bool value)
{
return value ? 42 : 0;
}
// Our instance of the delegate
private readonly ManagedDelegate _managedDelegate;
// Marshaled function pointer
private readonly unsafe delegate* unmanaged<bool, int> _nativeFunctionPointer;
// Delegate wrapping the marshaled function pointer
private readonly unsafe delegate* unmanaged<bool, int> _unmanagedDelegate;
// P/Invoke declaration for the native method
[DllImport(@"C:\temp\pinvokeBench\NativeDll\NativeDll.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int Method(bool value);
public unsafe PInvokeBenchmarks()
{
// Create the managed delegate
_managedDelegate = ManagedImplementation;
// Marshal it to a native function pointer
_nativeFunctionPointer = (delegate* unmanaged<bool, int>)Marshal.GetFunctionPointerForDelegate(_managedDelegate);
}
[Benchmark]
public unsafe int MarshaledDelegateCall()
{
return _nativeFunctionPointer(true);
}
}
}(EgorBot will reply in this issue)