Needed help in Asynchronous DBus method call using low level APIs

[Thiago Macieira]

On Monday, 29 de August de 2011 20:02:54 kuladeep chowdary wrote:
> Hi All,
> 
> I am new to DBus IPC. I am trying to call a method in server, from client
> and getting reply asynchronously, using *dbus_pending_call_set_notify( )
> *API.. But i am failing to get it done. i am testing even for pending call
> is NULL or not.. but still i am unable to get it.. i suspect before server
> sends reply, client process is exiting. But i think internally there will
> be thread running to get the reply message asynchronously, but its not
> happening. I am bit confused.. :( I am attaching the code(both server.c and
> client.c). Please help to sort out this issue. some sample code will be
> very much help full..

Hello

Let's start by addressing the part where you say "there will be thread 
running". There's no call to pthread_create in your code, nor anything with 
"thread" anywhere. If you didn't start a thread, there is no other thread 
running.

You're making a wrong assumption that D-Bus has threads in the background. It 
doesn't.

In your client.c code, on line 66 you send the call. If the sending succeeds, 
you'll set the notify function on line 73. So far so good.

The next step is line 84, where you unref the pending connection. That means 
you no longer care about receiving the reply. After that, you exit the 
program.

If you wish to receive the reply, you must wait for the reply to arrive before 
you unref the "pending" object.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel Open Source Technology Center
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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