Search code examples
c++sendsignalsglibdbus

DBus Glib, send a signal with a struct nested

I'm developing an application on c++ language on linux. I want to send a signal as this:

<signal name="EmitSignal">
    <arg type="(u(i)uussssu)" name="t_struct_of_signal" direction="out" />
</signal>

The second parameter in type="(u(i)uussssu)" is an enum type.

I'm trying to register a struct 

#define STRUCT_OF_SIGNAL (dbus_g_type_get_struct ("GValueArray", \
                         G_TYPE_UINT, \
                         G_TYPE_POINTER, \ 
                         G_TYPE_UINT, \
                         G_TYPE_UINT, \
                         G_TYPE_STRING, \
                         G_TYPE_STRING, \
                         G_TYPE_STRING, \
                         G_TYPE_STRING, \
                         G_TYPE_UINT, \
                         G_TYPE_INVALID))

but I've some errors :

** (process:21792): WARNING **: No marshaller registered for type "gpointer"
** (process:21792): WARNING **: failed to marshal parameter 1 for signal EmitSignal

Can someone help me?

Thanks so much

Solution

  • I resolved it: I changed G_TYPE_VALUE_ARRAY to dbus_g_type_get_struct ("GValueArray", G_TYPE_UINT, G_TYPE_INVALID)

    Then, this was:

    g_value_init(g_value_array_get_nth(ret, 0), G_TYPE_VALUE_ARRAY);

    Now, it is:

    g_value_init(g_value_array_get_nth(ret, 0), dbus_g_type_get_struct ("GValueArray", G_TYPE_UINT, G_TYPE_INVALID));

    Probably, the G_TYPE_VALUE_ARRAY and the GValueArray struct aren't compatible.