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From: Charles Lepple Date: January 22, 2008 10:16:42 PM EST To: Warren Jasper Subject: Re: [libhid-discuss] Opening multiple devices On Jan 22, 2008, at 11:00 AM, Warren Jasper wrote: > Problem: One of the shortcomings of the current implementation of > libhid is that it does not handle multiple devices correctly. For > example, with > two identical devices on the USB bus with the same vendor and > product id's, libhid returns a handle to the first successful > match. I do not believe that > this was the intended behavior of the package. Solution: > I have attached a patch to hid_opening.c that should fix the > problem. It basically keeps a list of currently open device/ > interface pairs, and keeps searching > for a new device/interface before looking for a match. Before > returning from hid_open for hid_force_open, it adds the device to > the list of open > device/interface pairs. > This implementation does not work for different processes and is > not currently thread safe. However, libhid has these same issues. Looks good. I can't test this at the moment, but I'll put it in the tree [rev. 355] and see if anyone else has trouble with it. I agree that it should be dynamic, but 20 devices should be OK for most people. -- Charles Lepple _______________________________________________ libhid-discuss mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss
