How to watch file descriptor activity via GMainLoop?
- From: Toralf Lund <toralf procaptura com>
- To: gtk-list gnome org
- Subject: How to watch file descriptor activity via GMainLoop?
- Date: Thu, 29 Jan 2009 17:25:03 +0100
I'm trying to integrate a raw socket based communication link into a
main loop using GMainLoop - on the server-side, i.e. the process that
listens for connections on the sockets. Does anyone have any good
examples on how this might be done? I suppose I want a callback, doing
accept() on the socket, every time there is activity on the main file
descriptor for the socket, and subsequently when data arrives on the
filedescriptor(s) from accept() - but how exactly do I set this up?
Maybe GPollFd and g_source_add_poll() are the keys here, but the
documentation is not very clear on how to use these. Also, a normal
GSourceFunc type callback does not quite seem suitable for this, in that
no reference to the file descriptor will be passed (is there an
alternative?) Also, the following note got me wondering [From the
The event source's check function will typically test the
/|revents|/ field in the GPollFD
struct and return |TRUE|
if events need to be processed.
Shouldn't the function do the actual event handling, and return true or
false based on whether or not the GMainLoop should keep watching for
I'm confused... Help, anyone?
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