Don't error when querying the number of devices if there are no devices present in the system.
We should just return 0 for the number of devices in this case and let the application handle this situation.
Change-Id: I20614ade5e649f3ce9ddd970d4b38bfe296f6cdb
~45% to 50% of Performance drop on rocBLAS_int8 test
Add support for active waits without blocking the host thread.
Change-Id: Ie7bb48dcafcb4c93d448bf74749b829b626c3578