> I have an unmanaged structure that looks like this:
>
> ------------------------------
> typedef struct event_struct {
> struct event_struct *next;
> int type;
> union {
> struct ev_levels levels;
> struct ev_text text;
> struct ev_call_state call;
> struct ev_netstats netstats;
> struct ev_url url;
> struct ev_video video;
> struct ev_registration reg;
> } ev;
> } event;
> ------------------------------
>
> I don't know how to wrap this structure, I know that the only posible
> way us by using the attribute [StructLayout (LayoutKind.Explicit]]
> and the attribute [FieldOffset (..)]
>
> the structures that are inside the union are easy to wrap, they look like
> this:
> ------------------------------
> struct iaxc_ev_levels {
> float input;
> float output;
> };
> ------------------------------
If I were you, I would define multiple structures, one per union value:
[StructLayout (Sequential)]
struct ev_levels_container {
IntPtr next;
int type;
ev_levels level;
}
And on the caller code, depending on the type value convert a class into
the proper underlying class.
Miguel
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