Re: [Bluez-users] multithread / multi process use

["Albert Huang" <albert@csail.mit.edu>]

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> 1 .can the daemon  hci manage simultenous requests from variuos
> process/threads without problem ?

yes.  Currently, if one process attempts to start a device inquiry
while one is already in progress, then hcid will raise a DBusException
and refuse to honor the second request.  The second process may still
listen for discovery and name lookup events.

> 2 .where I can find some api docs(if any) about the hcid ?

current document exists, but is difficult to find and not very
beginner friendly.  Downoad the bluez-utils source and look in
hcid/dbus-api.txt  You can use the attached python script as a
starting point.  It's not terribly elegant about detecting when an
inquiry is already in process, but I don't think that hcid is sending
standardized error codes in its exceptions...

-albert

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[-- Attachment #2: inquiry-with-names.py --]
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import gobject
import dbus

import dbus.glib

def onRemoteNameUpdated( address, name ):
    print address, name.encode("utf-8")

def onDiscoveryCompleted():
    print "discovery completed"
    mainloop.quit()

bus = dbus.SystemBus()
bluez = bus.get_object('org.bluez', '/org/bluez')
manager = dbus.Interface(bluez, 'org.bluez.Manager')
obj = bus.get_object('org.bluez', manager.DefaultAdapter())
adapter = dbus.Interface(obj, 'org.bluez.Adapter')
try: 
    adapter.DiscoverDevices()
except dbus.DBusException, e:
    if e.args[0] == "Discover in progress": 
        print "hcid reports existing device discovery already in progress."

adapter.connect_to_signal( 'DiscoveryCompleted', onDiscoveryCompleted )
adapter.connect_to_signal( 'RemoteNameUpdated', onRemoteNameUpdated )

mainloop = gobject.MainLoop()
mainloop.run()

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