Re: thread blocks/freezes the main gui

[Bob Caryl <bob fis-cal com>]

Your call to Gtk::Thread::join (shown below)

void MainPage::envoyer_directive_courrante(){

	//envoit une directive au bvl_serveur
	send_dir_thread = Glib::Thread::create(sigc::mem_fun(*this,&MainPage::ecrire_entree_standard),true);
	send_dir_thread->join();
}

will wait until the joined thread terminates before returning;  hence, 
all processing in your main window stops.

Bob Caryl

Anca Mitrica wrote:

> Hello,
>
> I am writing an application that communicates, between
> others, with another program (server) through pipes.
> My application has a textview and a button that sends
> the textview content to the server.
> The communication is made via a thread wich writes to
> the standard input of the server the textview content.
> The server is run with g_spawn_async_with_pipes.
>
> Somehow, the writing thread is blocking the main user
> interface, that must be active all the time. Can
> anyone has an idea??
>
> The code is the following:
>
> //the button function 
> ...........................................................
> //run the server
> g_spawn_async_with_pipes(NULL,argv,NULL,(GSpawnFlags)(G_SPAWN_DO_NOT_REAP_CHILD),NULL,NULL,
> 			  
> &stat_autochildpid,&childstdin,&childstdout,&childstderr,&error)){
> 			    	
> 			//sauver le pid du processus bvl_serveur
> 			save_auto_pid(stat_autochildpid);
> 			//attends que le processus se termine
> 			g_spawn_close_pid(stat_autochildpid);
> 		}
> envoyer_directive_courrante();
>
> ..................................................
> //envoyer_directive_courrante  function
> void MainPage::envoyer_directive_courrante(){
>
> 	//envoit une directive au bvl_serveur
> 	send_dir_thread =
> Glib::Thread::create(sigc::mem_fun(*this,&MainPage::ecrire_entree_standard),true);
> 	send_dir_thread->join();
> }
> ...........................................
> //function for the thread
> void MainPage::ecrire_entree_standard(){
>
>        line_to_send = *stat_diriterator;		
>
> line_to_send.erase(0,line_to_send.find_first_of(",",0)+1);
>
> 	Glib::RefPtr<Glib::IOChannel> in_channel =
> Glib::IOChannel::create_from_fd(childstdin);
> 	in_channel->write(line_to_send);	
> 	//in_channel->close();
> 	/* for(unsigned int i = 0;i<line_to_send.size();i++){
> 		cout<<line_to_send[i];
> 	}
> 	cout<<endl; */
> 	
> 	
> 	
> 	//stat_diriterator++;
> }
>
>
> Anca Mitrica
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list
>
>