[gst-devel] running g_main_loop_run in separate thread question.

[Edward Hervey]

On Wed, 2010-03-24 at 06:29 -0800, wanting2learn wrote:
> I have the following code:
[...]
> int main()
> {
> 
>      start_pipeline();
> 
>      while(1)
>      {
>         //do stuff here
>      }
> 
>      //blah blah
> }
> 
> Now my pipeline runs fine but I have kicked off a new thread to handle the
> bus messages:
> boost::thread thread_gstreamer2(task_gstreamer);
> 
> void task_gstreamer()
> {
>    g_main_loop_run (g_Loop); 
> }
> 
> 
> The reason I have added this in a new thread is because of the while(1) loop
> in my main() function.  If I put the g_main_loop_run in my main() before my
> while(1) loop then it would block.
> But the problem is that I do not receive any bus messages at all when I
> implement it like this.  
> Can I do it this way?? 
> 
> 

 I don't get it... why are you asking again and again about the same
question ? Tim replied to you a week ago how to handle bus messages when
you already have a main loop yet your persist in wanting to add a
GMainLoop.

  So, to summarize:
  1) DO NOT USE GMAINLOOP IF YOU ALREADY HAVE A MAIN LOOP
  2) Read 1) again at least 50 times times
  3) Do as follow in your main()

int main()
{

     start_pipeline();

     while(1)
     {
        // Do stuff here
        // See if we have pending messages on the bus and handle them
        while ((msg = gst_bus_pop (g_bus))) {
          // Call your bus message handler
          bus_call (g_bus, msg, nada);
          gst_message_unref (msg);
        } 
     }

     // Stuff before we exit the application
}

  4) DO NOT USE GMAINLOOP IF YOU ALREADY HAVE A MAIN LOOP

Also : http://en.wikipedia.org/wiki/Event_loop will be an interesting
read if you still see a difference between GMainLoop and "Main Loop"

   Now, start2digest

    Edward