EFI_SIMPLE_WINPHONE_IO_PROTOCOL.Read

Article
03/23/2023

The Read function reads data from the device.

Syntax

typedef
EFI_STATUS
(EFIAPI * EFI_SIMPLE_WINPHONE_IO_READ) (
  IN EFI_SIMPLE_WINPHONE_IO_PROTOCOL    *This,
  IN UINTN                              NumberOfBytesToRead,
  IN OUT UINTN                          *NumberOfBytesRead,
  OUT VOID                              *Buffer
  );

Parameters

This
A pointer to the EFI_SIMPLE_WINPHONE_IO_PROTOCOL instance.

NumberOfBytesToRead
The maximum number of bytes to be read.

NumberOfBytesRead
The amount of data returned in the Buffer in bytes.

Buffer
The buffer to return data into.

Return values

The function returns one of the following values:

Status code	Description
EFI_SUCCESS	The function returned successfully.
EFI_INVALID_PARAMETER	A parameter is invalid.
EFI_DEVICE_ERROR	The physical device reported an error.
EFI_NOT_READY	The physical device is busy or not ready to process this request.
EFI_TIMEOUT	Time-out occurred before establishing a connection.
EFI_NO_RESPONSE	The connection to the host is nonexistent or has been terminated.

Remarks

This function will block until the requested amount of data is available or it times out.

In case of errors, no more bytes will be read, and the appropriate status code will be returned. In all cases, the number of bytes actually read is returned in NumberOfBytesRead.

Requirements

Header: User generated

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