1.1.1.3 DRV_HANDLE_INVALID Macro

#define DRV_HANDLE_INVALID (((DRV_HANDLE) -1))

Invalid device handle.

If a driver is unable to allow an additional module to use it, it must then return the special value DRV_HANDLE_INVALID. Callers should check the handle returned for this value to ensure this value was not returned before attempting to call any other driver routines using the handle.

None.