11.3 GetControllerName() Implementations
The GetControllerName()
service retrieves the name of a controller a driver
is managing or a child the driver has produced. The example below shows an
empty implementation of the GetControllerName()
service for the Component
Name 2 Protocol. The recommended implementation style shown here allows the
same GetControllerName()
service implementation to be shared between both the
Component Name Protocol and the Component Name 2 Protocol.
Example 130-GetControllerName () Service
#include <Uefi.h>
#include <Protocol/ComponentName2.h>
EFI_STATUS
EFIAPI
AbcGetControllerName (
IN EFI_COMPONENT_NAME2_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle, OPTIONAL
IN CHAR8 *Language,
OUT CHAR16 **ControllerName
)
{
}
The Component Name Protocols are available only for devices currently under a driver's management. Because UEFI supports connecting the minimum number of drivers and devices required to establish console and gain access to the boot device, there may be many unconnected devices for which a name may not be retrieved.