Re: [gnet] problem with g_io_add_watch on UDP socket

[tc6 free fr]

ioChannel_ isn't a GIOChannel but Glib::RefPtr<Glib::IOChannel> (sorry I forgot
to specify this)

I prefer using Glib::RefPtr<Glib::IOChannel> because callback management is
easier and accept class methods (not the usual static gboolean function...).
Then the code should be cleaner in C++.

>
> Hi!
>
> > Here is what I did (it still doesn't work, but I can compile and the
> > callback is called):
> >
> > int fd =
> > g_io_channel_unix_get_fd(gnet_udp_socket_get_io_channel(socket_));
> > ioChannel_ = Glib::IOChannel::create_from_fd(fd);
> that makes no sense, you get the channel, then get fd from that channel,
> then create a channel from that fd. try that
> ioChannel_ = gnet_udp_socket_get_io_channel(socket_);
>
> > ioSource_ = Glib::IOSource::create(ioChannel_, Glib::IO_IN|Glib::IO_OUT|
>
>
> > Glib::IO_HUP|Glib::IO_ERR|Glib::IO_NVAL);
> > ioSource_->connect(sigc::mem_fun(*this, &netConnect::client));
> > ioSource_->attach(Glib::MainContext::get_default());
> >
> > The problem now is that the callback: netConnect::client is called but
> > only IO_OUT condition is true and never IO_IN (the server is sending
> > string on the other side of the channel, so that the client should
> > normally receive something).
> >
> > I try both read/write functions (of IOChannel) and gnet receive/send
> > method and none of them works. Is it possible that the IOChannel is
> > write or read protected?
> >
> > fd is the same for both client and server (which is a pretty good thing
> > I guess)
> >
> > If someone has an idea on how this could work (or if it will work one
> > day...)
> > I had another question about using a non blocking "receive" function (I
> > thing it is in documentation but can't remember where...).
> >
> > Thank you
> >
> > Hubert SokoÅ&#65533;owski wrote:
> >
> >>Hi!
> >>
> >>On Sat, 16 Apr 2005 17:03:17 +0200
> >>tc6 <tc6 free fr> wrote:
> >>
> >>
> >>
> >>>Hello,
> >>>
> >>>I'm experiencing problems to make g_io_add_watch works with an udp
> >>>socket.
> >>>
> >>>Here is my code :
> >>>  GIOChannel *ioC_;
> >>>  ioC_ = gnet_udp_socket_get_io_channel(socket_);
> >>>  g_io_add_watch(ioC_, G_IO_IN, greceive, socket_);
> >>>
> >>>where greceive is defined as follows:
> >>>
> >>>static gboolean greceive(GIOChannel *source, GIOCondition cond, void
> >>>*data)
> >>>{
> >>>  char buffer[100];
> >>>  gsize bytesRead = 0;
> >>>  GInetAddr* addr;
> >>>  GUdpSocket *sock = (GUdpSocket *)data;
> >>>
> >>>  std::cout<<"Received something "<<std::endl;
> >>>  if (cond & (G_IO_IN))
> >>>    {
> >>>      gnet_udp_socket_receive(sock, buffer, sizeof(buffer), &addr);
> >>>      std::cout<<"Received buffer: "<<buffer<<std::endl;
> >>>    }
> >>>  else if (cond & (G_IO_ERR | G_IO_NVAL | G_IO_HUP))
> >>>    {
> >>>      std::cout<<"Error received"<<std::endl;
> >>>      return false;
> >>>    }
> >>>}
> >>>
> >>>The problem is here that the callback is never called (indeed
> >>>"Received
> >>>something" is never printed).
> >>>
> >>>
> >>do you run g_main_loop_run in the begining of your program?
> >>g_io_add_watch requires glib main loop to be running.
> >>I am not sure whether you can use glib/gnet in a C++ program.
> >>
> >>
> >>
> >>>Is it possible to use read/write
> >>>functions
> >>>for the GIOChannel or not (as mentionned in documentation)?
> >>>
> >>>
> >>you can use g_io_channel_unix_get_fd to get the file handle, but
> >>you should use g_io_channel_* set of functions to read and write.
> >>
> >>hs
> >>_______________________________________________
> >>gnet mailing list
> >>gnet lists gnetlibrary org
> >>http://lists.gnetlibrary.org/mailman/listinfo/gnet
> >>
> >>
> >>
> >>
> >
> > _______________________________________________
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> >
>
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