Re: thread blocks/freezes the main gui

[Bob Caryl <bob fis-cal com>]

Sorry, my mistake:  meant to write Glib::Thread::join instead of 
Gtk::Thread::join.

Bob

Bob Caryl wrote:

> 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
> >
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>
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