Hi all, On 26.01.2010, at 15:46, m. allan noah wrote:
> Seems like an individual backend should not need to parse the device > string. Isn't there some other way to come up with a unique semaphore, > like process id? the process id could be used, but it may fail theoretically. One example is a frontend that uses two (snapscan-)scanners at the same time (not that I think anybody actually does that). The clean solution is a semaphore per device. In the days before libusb the backend used ftok(). The current code was written by Julien, as far as I know, because the ftok() call failed miserably and the unique id was always 0. So I guess I'll stay with the device string, but maybe use some sort of crc instead of parsing it. Other ideas are, of course, welcome. Kind regards, Oliver
