not able to receive any indications using libqmi on Linaro

[Shilpa Velamuri]

Code is :
init():
    pthread_create(&mthread, NULL, InitializeDevice, this);

 InitializeDevice():
   mainLoop = g_main_loop_new(NULL, false);
   qmi_device_new(file,
                            cancellable,
                           (GAsyncReadyCallback) FileReadyCallback,
                           gpointer(user_data));

   g_main_loop_run(mainLoop);

FileReadyCallback():
    qmi_device_open(device,
                              flags,
                              timeout,
                              cancellable,
                              (GAsyncReadyCallback) DeviceCallback,
                              user_data);

DeviceCallback():
    qmi_device_allocate_client(device,
                                            QMI_SERVICE_NAS,
                                            cid,
                                            timeout,
                                            cancellable,

(GAsyncReadyCallback)NasClientCallback,
                                            (gpointer)this);

NasClientCallback():
    input = qmi_message_nas_register_indications_input_new();

 qmi_message_nas_register_indications_input_set_serving_system_events(input,
true, &error);

  qmi_client_nas_register_indications(QMI_CLIENT_NAS(nasClient),
                                                      input,
                                                      timeout,
                                                      cancellable,
                                                      RegIndCallback,
                                                      (gpointer)this);

  qmi_message_nas_register_indications_input_unref(input);

RegIndCallback():
    g_signal_connect(nasClient,
                              "serving-system",
                              G_CALLBACK (SrvSysIndCallback),
                              user_data);


Problem : SrvSysIndCallback is never invoked.

Thank You.


On Thu, Nov 17, 2016 at 1:10 AM, Aleksander Morgado <
aleksander at aleksander.es> wrote:

> Hey,
>
> On Wed, Nov 16, 2016 at 11:29 PM, Shilpa Velamuri <shilpa.vel at gmail.com>
> wrote:
> > The libqmi interaction/WWAN code is all running in a separate thread
> being
> > part of a bigger application. The g_main_loop is running in this thread.
> I
> > am receiving responses to requests but no indications from libqmi. Code
> is
> > using proxy to talk to LE910 modem.
> >
>
> It is usually much simpler if you provide e.g. a working minimal
> example showing the issue, instead of explaining what the code does.
>
> > In the callback of Nas Client allocation, i invoke:
> > qmi_client_nas_register_indications(...)
> >
> > In the callback to the above qmi_client_nas_register_indications:
> >
> > i register for NAS serving-system indication as :
> > g_signal_connect(nasClient,
> >                           "serving-system",
> >                           G_CALLBACK (SrvSysIndCallback),
> >                           callback_data);
> >
> > The callback is never invoked even though the modem is registered and has
> > service.
> >
> > what am i doing wrong? Could you help?
>
> Maybe you need to define which is the thread-default main context as
> soon as you create the new thread where the libqmi main loop is
> supposed to run? See  g_main_context_push_thread_default(). Otherwise,
> the g_signal_connect() you run may schedule the signal events in the
> main context of the main thread, but you don't have a main loop
> running there, right?
>
> --
> Aleksander
> https://aleksander.es
>
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