harmony 鸿蒙ScsiPeripheral_DeviceMemMap
ScsiPeripheral_DeviceMemMap
Overview
Represents the device memory mapping created by calling OH_ScsiPeripheral_CreateDeviceMemMap. The buffer that uses the device memory mapping can provide better performance.
Since: 18
Related module: SCSI Peripheral DDK
Header file: scsi_peripheral_types.h
Summary
Member Variables
| Name | Description |
|---|---|
| uint8_t *const address | Buffer address. |
| const size_t size | Buffer size. |
| uint32_t offset | Offset of the used buffer. The default value is 0, indicating that there is no offset and the buffer starts from the specified address. |
| uint32_t bufferLength | Length of the used buffer. By default, the value is equal to the size of the buffer, indicating that the entire buffer is used. |
| uint32_t transferredLength | Length of the data to be transferred. |
Member Variable Description
address
uint8_t* const ScsiPeripheral_DeviceMemMap::address
Description
Buffer address.
bufferLength
uint32_t ScsiPeripheral_DeviceMemMap::bufferLength
Description
Length of the used buffer. By default, the value is equal to the size of the buffer, indicating that the entire buffer is used.
offset
uint32_t ScsiPeripheral_DeviceMemMap::offset
Description
Offset of the used buffer. The default value is 0, indicating that there is no offset and the buffer starts from the specified address.
size
const size_t ScsiPeripheral_DeviceMemMap::size
Description
Buffer size.
transferredLength
uint32_t ScsiPeripheral_DeviceMemMap::transferredLength
Description
Length of the data to be transferred.
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