usbdUnmapMemory
Purpose
Unmaps memory.
Syntax
#include <usbdi.h>
USBstatus usbdUnmapMemory(handle, hmap)
USBhandle handle;
USBhandle hmap;
Parameter
| Item | Description |
|---|---|
| handle | Handle of open USB logical device that is returned by the USBD_OPEN_DEVICE fp_ioctl. |
| hmap | Map handles returned from the usbdMapMemory function. |
Description
The USB client driver uses this function to unmap previously mapped memory. All I/O referencing the memory block must be completed before this function is called. This function can be called from process environment only.
Execution Environment
This function might be called from the process environment only.
Return Values
| Value | Description |
|---|---|
| USBD_SUCCESS | Success |
| All others | Failure |