Re: [Libusb-win32-devel] usb_find_devices invalidates usb_dev_handlewhen the device was removed

[Dan E. <Dan...@ne...>]

This will only be a problem if you access the device through the handle
yourself. I can't see anywhere in the code where this device pointer int
the handle structure is accessed after the initial opening of the
device.
=20
I did think this was a problem at one point in time, but when I looked
harder at the code I convinced myself it wasn't a problem and eventually
tracked down the crash to something else.
=20
Dan.

________________________________

From: lib...@li...
[mailto:lib...@li...] On Behalf Of
Mantz Steffen
Sent: 28 September 2006 11:53
To: lib...@li...
Subject: [Libusb-win32-devel] usb_find_devices invalidates
usb_dev_handlewhen the device was removed



Hi,=20

The problem arises in a multi threaded application. Thread #1
periodically checks for new and removed devices, while another thread
handles an attached device. When a handled device is removed,
usb_find_devices() deletes the devices. This invalidates the refrence to
it in the usb_dev_handle, before the handler thread can be informed.
Typically this leads to a crash. Any ideas?

Thanks,=20
Steffen=20