Hi,
On 2015年07月23日 17:21, Vinllen Chen wrote:
> Hi, Haixiang and iwase :
>
> Hear comes my code :
> class Main(app_manager.RyuApp) :
> ....
> def __init__(self, *args, **kwargs):
> ....
> def start(self) :
> super(Main, self).start()
> self.threads.append(hub.spawn(Tun_Tap())) # call Tun_Tap class
>
> class Tun_Tap() :
> def __init__(self) :
> self.create_device()
> self.run()
> def create_device(self) : # create tun/tap device
> self.tun = open('/dev/net/tun', 'r+b')
> ifr = struct.pack('16sH', 'tap0', IFF_TAP | IFF_NO_PI)
> fcntl.ioctl(self.tun, TUNSETIFF, ifr)
> fcntl.ioctl(self.tun, TUNSETOWNER, 1000)
> subprocess.check_call('ifconfig tap0 30.1.1.1/24
> <http://30.1.1.1/24>', shell=True)
> def run(self) :
> while True:
> packet_raw = os.read(self.tun.fileno(), 2048) # it will read from
> the tun/tap device, but it'll be blocked when there is no data
>
> The Tun_Tap class will be blocked when run "read", so do you have any idea to
> solve this problem ? I find the Main class will never run when the Tun_Tap is
> blocked
Ryu uses eventlet (Python networking library) to create new threads.
In eventlet thread, the codes with blocking I/O (e.g. file I/O) may block all
other threads.
Thanks,
Iwase
>
> On Thu, Jul 23, 2015 at 4:04 PM, Yusuke Iwase <[email protected]
> <mailto:[email protected]>> wrote:
>
> Hi,
>
> On 2015年07月23日 16:18, Vinllen Chen wrote:
> > Hi, Dear all:
> >
> > I want to create a new thread/coroutine in RYU app, i find it's not ok
> to write the code below:
> >
> > class App(app_manager.RyuApp) :
> > def __init__(self, *args, **kwargs):
> > ...
> > hub.spawn(New_One())
>
> What messages did you get?
>
> hub.spawn() is defined as follow.
> https://github.com/osrg/ryu/blob/master/ryu/lib/hub.py#L47
>
> e.g.)
> from ryu.lib import hub
> ...
> class YourApp(app_manager.RyuApp) :
> def __init__(self, *args, **kwargs):
> ...
> hub.spawn(self.target_func)
>
> def target_func(self):
> ...
>
> Thanks,
> Iwase
>
> >
> > --
> > Best Regards,
> > Vinllen
> >
> >
> >
> ------------------------------------------------------------------------------
> >
> >
> >
> > _______________________________________________
> > Ryu-devel mailing list
> > [email protected] <mailto:[email protected]>
> > https://lists.sourceforge.net/lists/listinfo/ryu-devel
> >
>
>
>
>
> --
> Best Regards,
> Vinllen
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