Calling C# code from C++ in IOS ?

Is there a way to call Unity C# code from C++ in iOS ?

I tried following different samples like this one : http://stackoverflow.com/questions/...ation-between-unmanaged-code-and-unity3d-code but my C# function never gets called (i'm outputting some text to log) and I'm on Unity 5.0 so I don't know if that method still works in 2015 and/or if it works for iOS static linking "plug-ins".