[Mono-list] Mono embedding: invoke c code with char*

Robert Jordan robertj at gmx.net
Wed Apr 9 05:08:03 EDT 2008

Ing. Francesco Carsana wrote:
> Hi,
> I'm working with mono embedding, and I'm trying
> to invoke a c function that accepts two
> parameters:
>     [MethodImpl(MethodImplOptions.InternalCall)]
>     private unsafe extern static void
>       OnConnectHandler(char* _ipAddress, bool _connected);
> This function is invoked inside this method:
>     private static void OnConnect(string _ip, bool _conn);
> The problem is: how can I convert string to char*?
> Is it possible to invoke mono_string_to_utf8?
> Thank You.

Why would you use the signature OnConnectHandler(char* _ipAddress, bool 
_connected); for an internal call in the first place??

Declare it as OnConnectHandler(string, bool) and use MonoString*
for your C++ icall. There you can use mono_string_to_utf8.


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