On Sunday, April 8, 2012 3:55:41 PM UTC-5, Adam Skutt wrote: > On Apr 8, 2:45 pm, "superhac...@gmail.com" <superhac...@gmail.com> > wrote: > > I am using the python module nfqueue-bindings which is a nfqueue > > packet intercepting module. It uses the following snippet of code to > > start the process: > > > > print "trying to run" > > try: > > q.try_run() > > except KeyboardInterrupt, e: > > print "interrupted" > > > > The q.try_run() method blocks. I would like to be able to interrupt > > this the same way you can hit control-c to unblock it, but from > > another thread. Does anyone have any idea on how to do this? Is > > there some sort of Exception I can generate from another thread that > > would do this? > > The simplest and most reliable way will be to modify the asynchronous > I/O example at > https://www.wzdftpd.net/redmine/projects/nfqueue-bindings/repository/entry/examples/nfq_asyncore.py > to do what you want. The classical way to accomplish this would be to > create a second I/O descriptor (via os.pipe or similiar) and wait for > that descriptor in the same async I/O loop. When you want to stop the > loop, send a message (could be a single byte) to the second descriptor > and then respond appropriately in your asynchronous I/O handler. > > However, simply ignoring the nfqueue socket while doing other > processing might be acceptable too. I would read the documentation > and ask questions carefully before taking that approach, as it may > lead to lost data or other problems. The viability of this approach > depends heavily on your application. > > Adam
Thanks for the reply Adam. I am still confused with the example with the example you linked to. I have only been working with Python for a couple of weeks, but I am fluent with C. Given the example you linked to, are you saying that this is the run loop for asynchronous comm that a end user of the module could use? Or is this something with the nfqueue-bindings module that I would I have to modify. I don't recognize the the main loop in the example. I am not not worried about losing data, I just need to start and stop this from another thread. -- http://mail.python.org/mailman/listinfo/python-list
