The example below shows an example implementation of the GetVersion() function of the Driver Family Override Protocol. This function returns a UNIT32 value and, in this case, returns a value from a define statement in the UEFI Driver. The manufacturer of a family of controllers is free to select any version value assignment as long as UEFI Drivers that are required to be used over previously released UEFI Drivers have higher values.

Example 159-GetVersion() Function of the Driver Family Override Protocol

#include <Uefi.h>
#include <Protocol/DriverFamilyOverride.h>
​
#define ABC_DRIVER_FAMILY_OVERRIDE_VERSION 0x00050063
​
UINT32
EFIAPI
AbcGetVersion (
  IN EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL  *This
  )
{
  return ABC_DRIVER_FAMILY_OVERRIDE_VERSION;
}