Hello,
I've been running into the following Problem: I'm communicating using a USB
Handheld Barcode Scanner (USB HID Keyboard Device). Everything is fine, i've
opened the IN Endpoint using the UsbPipe and access it the following way:
currentDui = new DefaultUsbIrp(buffer);
currentDui = new DefaultUsbIrp(buffer);
currentDui.setAcceptShortPacket(true);
usbScannerPipe.syncSubmit(currentDui);
I receive the data i'm expecting and everything works fine UNTIL i want to
abort and cancel everything:
usbScannerPipe.abortAllSubmissions();
usbScannerPipe.close();
usbScannerPipe = null;
usbScannerInterface.release();
usbScannerInterface = null;
The problem is that syncSubmit immediately synchronizes using "submitLock"
(UsbPipeImp). After that the whole thing just keeps blocking while waiting
for data. When i call abortAllSubmissions from another Thread, it too locks
on "submitLock", waiting for the submitSync method to release this lock. IF
i scan another Barcode, the syncSubmit method returns and everything is
fine, otherwise it's a perfect deadlock.
What's the correct work-flow here? how can i cancel everything pending and
close the pipe and interface?
i'm using Ubuntu 10.04, and java-usb 1.0.1
Thanks in advance
Klaus Gradinger
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