USBD_UrbFree function (usbdlib.h)
The USBD_UrbFree routine releases the URB that is allocated by USBD_UrbAllocate, USBD_IsochUrbAllocate, USBD_SelectConfigUrbAllocateAndBuild, or USBD_SelectInterfaceUrbAllocateAndBuild.
Syntax
void USBD_UrbFree(
[in] USBD_HANDLE USBDHandle,
[in] PURB Urb
);
Parameters
[in] USBDHandle
USBD handle that is retrieved by the client driver in a previous call to the USBD_CreateHandle routine.
[in] Urb
Pointer to the URB structure to be released.
Return value
None
Remarks
You must call USBD_UrbFree to release the URB allocated by USBD_UrbAllocate after the request is complete.
Failure to call USBD_UrbFree can cause a memory leak.
For a code example, see USBD_UrbAllocate.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Requires WDK for Windows 8. Targets Windows Vista and later versions of the Windows operating system. |
| Target Platform | Desktop |
| Header | usbdlib.h |
| Library | Usbdex.lib |
| IRQL | <=DISPATCH_LEVEL |