sym

VALUE
rb_dlhandle_sym(VALUE self, VALUE sym)
{
    struct dl_handle *dlhandle;
    const char *name;

    name = SafeStringValuePtr(sym);

    TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle);
    if( ! dlhandle->open ){
        rb_raise(rb_eDLError, "closed handle");
    }

    return dlhandle_sym(dlhandle->ptr, name);
}