Efi_debugport_protocol.poll(), Efi_debugport_protocol.poll() summary, Prototype – Intel Extensible Firmware Interface User Manual
Page 733: Parameters, Description, Status codes returned
Protocols
— Debugger Support
Version 1.10
12/01/02
16-19
EFI_DEBUGPORT_PROTOCOL.Poll()
Summary
Checks to see if any data is available to be read from the debugport device.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_DEBUGPORT_POLL) (
IN EFI_DEBUGPORT_PROTOCOL
*This
);
Parameters
This
A pointer to the
instance. Type
EFI_DEBUGPORT_PROTOCOL
is defined in Section 16.3.
Description
The
Poll()
function checks if there is any data available to be read from the debugport device
and returns the result. No data is actually removed from the input stream. This function enables
simpler debugger design since buffering of reads is not necessary by the caller.
Status Codes Returned
EFI_SUCCESS
At least one byte of data is available to be read.
EFI_NOT_READY
No data is available to be read.
EFI_DEVICE_ERROR
The debugport device is not functioning correctly.