Re: IOBluetoothLocalDeviceReadName
Re: IOBluetoothLocalDeviceReadName
- Subject: Re: IOBluetoothLocalDeviceReadName
- From: Garth Cummings <email@hidden>
- Date: Tue, 14 Jan 2003 15:50:52 -0800
Hi Paul,
As a speculation, would IOServiceWaitQuiet() in IOKit/IOKitLib.h work?
This would required diving down into the I/O Kit layer briefly, though.
--gc
On Tuesday, January 14, 2003, at 11:22 AM, Eric Brown wrote:
On Tuesday, January 14, 2003, at 06:36 AM, Paul Davis wrote:
I have a question about the IOBluetoothLocalDeviceReadName function.
When
the Bluetooth USB dongle is plugged in and I start my application this
function returns the machine name. However, if I unplug/plug the USB
when my
application is active, the IOBluetoothLocalDeviceReadName callback
always
returns what appears to be the USB device default name (i.e. Broadcom
BCM2033) instead of the machine name. Is their any notification that
can
tell me when the firmware download to the USB dongle is complete so
that I
don't request the local device name prematurely? Or, can the callback
from
IOBluetoothLocalDeviceReadName be changed to only return when the
firmware
download to the Bluetooth USB dongle is complete?
As you've found, there is a race between the device appearing to an
application and begin fully initialized by the system. In this case,
I don't think the problem is the firmware download so much as the
difference in time between the device first appearing in the
IORegistry (which is what our API uses to find the device), and the
daemon getting the same notification and configuring the device with
the proper name, scan modes etc...
I also tried using while(!(IOBluetoothLocalDeviceAvailable()) as the
delay
before requesting the local name and this was unsuccessful as well.
I ended up using a time delay as a workaround. I was hoping to get
around
this since the time delay required may be different depending on
machine
speed.
For now, the delay is probably your best bet. We are working on
fixing the problem so that applications won't know about a device
until the daemon has fully configured it.
- Eric
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