public static void RunGetDelForFcnPtrTest()
{
Console.WriteLine($"Running {nameof(RunGetDelForFcnPtrTest)}...");
// Delegate -> FcnPtr -> Delegate
{
VoidDelegate md = new VoidDelegate(VoidVoidMethod);
IntPtr fcnptr = Marshal.GetFunctionPointerForDelegate <VoidDelegate>(md);
VoidDelegate del = (VoidDelegate)Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(VoidDelegate));
Assert.AreEqual(md.Target, del.Target, "Failure - the Target of the funcptr->delegate should be equal to the original method.");
Assert.AreEqual(md.Method, del.Method, "Failure - The Method of the funcptr->delegate should be equal to the MethodInfo of the original method.");
}
// Native FcnPtr -> Delegate
{
IntPtr fcnptr = FunctionPointerNative.GetVoidVoidFcnPtr();
VoidDelegate del = (VoidDelegate)Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(VoidDelegate));
Assert.AreEqual(null, del.Target, "Failure - the Target of the funcptr->delegate should be null since we provided native funcptr.");
Assert.AreEqual("Invoke", del.Method.Name, "Failure - The Method of the native funcptr->delegate should be the Invoke method.");
// Round trip of a native function pointer is never legal for a non-concrete Delegate type
Assert.Throws <ArgumentException>(() =>
{
Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(Delegate));
});
Assert.Throws <ArgumentException>(() =>
{
Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(MulticastDelegate));
});
}
void VoidVoidMethod()
{
Console.WriteLine("Simple method to get a delegate for");
}
}
public static void RunGetDelForFcnPtrTest()
{
Console.WriteLine($"Running {nameof(RunGetDelForFcnPtrTest)}...");
// Delegate -> FcnPtr -> Delegate
{
VoidDelegate md = new VoidDelegate(VoidVoidMethod);
IntPtr fcnptr = Marshal.GetFunctionPointerForDelegate <VoidDelegate>(md);
VoidDelegate del = (VoidDelegate)Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(VoidDelegate));
Assert.Equal(md.Target, del.Target);
Assert.Equal(md.Method, del.Method);
}
// Native FcnPtr -> Delegate
{
IntPtr fcnptr = FunctionPointerNative.GetVoidVoidFcnPtr();
VoidDelegate del = (VoidDelegate)Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(VoidDelegate));
Assert.Equal(null, del.Target);
Assert.Equal("Invoke", del.Method.Name);
// Round trip of a native function pointer is never legal for a non-concrete Delegate type
Assert.Throws <ArgumentException>(() =>
{
Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(Delegate));
});
Assert.Throws <ArgumentException>(() =>
{
Marshal.GetDelegateForFunctionPointer(fcnptr, typeof(MulticastDelegate));
});
}
void VoidVoidMethod()
{
Console.WriteLine("Simple method to get a delegate for");
}
}
