Re: [gnet] gnet conn callback problem

[David Helder <dhelder umich edu>]

Pinky,

I'm not sure if it's a GNet bug or not.  Conn's are *not* thread safe, so
that could be the problem.  If you use the Conn in one thread only, there
won't be a problem.  So I'd try moving the conn_client_func into thread 2.

David



On Wed, 25 Dec 2002 Pinky666 email si wrote:

> Hi, I have a little problem with callbacks. Here is a pseudo code snip:
>
> static void new_conn_cb(GServer* server, GServerStatus status, GConn* conn, gpointer ptr) { // new connection callback
>         if (status == GNET_SERVER_STATUS_CONNECT) {
>                 ...
>                 conn->user_data = NULL;
>                 conn->func=&conn_client_func; // setup socket callback now (it is same as the one provided in examples, ob_client_func)
>                 ...
>         } else {
>                 g_log(__FILE__,G_LOG_LEVEL_DEBUG,"Connection attempt error");
>         }
> }
>
> Thread1(main thread) = 1-
> Thread2(client thread) = 2-
>
> 1-
>         ...
>         gnet_init();
>         main_loop = g_main_loop_new(NULL,FALSE);
>         ...
>         addr = gnet_inetaddr_new_any ();
>         gnet_inetaddr_set_port (addr, port);
>         TCPserver=gnet_server_new(addr,TRUE,new_conn_cb,NULL); // create new TCP server
>         ...
>         Creates thread 2 and runs it
>         ...
>         g_main_loop_run(main_loop); // "stops" here
>         ...
> 2-
>         ...
>         waits for connection
>         ...
>
> Then I connect to it...
>
> 1?-
>         it executes new_conn_cb with GNET_SERVER_STATUS_CONNECT,
>         then I send a message to thread2
> 2-
>         ...wakes up...
>         gnet_conn_write(conn,g_strdup(txt1->str),txt1->len,0); // send greetings1
>         gnet_conn_write(conn,g_strdup(txt2->str),txt2->len,0); // send greetings2
>         ...
> 1?-
>         executes callback conn_client_func ("ob_client_func") with GNET_CONN_STATUS_WRITE
>
> Until here is all as it ?should? be; create gnet_server, setup callback and wait for connection.
> When connection arrives, update connection's callback address so we can receive GNET_CONN_STATUS_WRITE,
> If I write to it and I receive back CONN_STATUS_WRITE. CONN_STATUS_READ also works fine.
>
> BUT,
> The problem is, that I receive only one STATUS_WRITE callback, for first greeting. I also see it in telnet, but
> only the first one, nothing more even if I do gnet_conn_write 1000x times.
> It is very rare that I get both writes acknowledged by a 2 callbacks. If that happens all is working just fine: every
> gnet_conn_write generates a callback and displays text in telnet client.
>
> Any idea, why it "hungs" after first gnet_conn_write?
>
> ... if anyone needs detailed code of this matter I can send to him or post it to the mailing list
>
> Thanks,

-- 
      __          _    __ David Helder - dhelder umich edu
  ___/ /__ __  __(_)__/ / <http://www.eecs.umich.edu/~dhelder>
 / _  / _ `/ |/ / / _  /  DiaWebLog: <http://www.diaweblog.org>
 |_,_/|_,_/|___/_/|_,_/   Paper CD Case: <http://www.papercdcase.com>