WinUsb_UnregisterIsochBuffer function (winusb.h)

The WinUsb_UnregisterIsochBuffer function releases all of the resources that WinUsb_RegisterIsochBuffer allocated for isochronous transfers. This is a synchronous operation.

Syntax

BOOL WinUsb_UnregisterIsochBuffer(
  [in] WINUSB_ISOCH_BUFFER_HANDLE IsochBufferHandle
);

Parameters

[in] IsochBufferHandle

An opaque handle to the transfer buffer that was registered by a previous call to WinUsb_RegisterIsochBuffer.

Return value

WinUsb_UnregisterIsochBuffer returns TRUE if the operation succeeds. Otherwise this function returns FALSE, and the caller can retrieve the logged error by calling GetLastError.

Remarks

The caller must ensure that there are no pending transfers that is currently using the buffer before calling WinUsb_UnregisterIsochBuffer. If there are pending transfers, WinUsb_UnregisterIsochBuffer blocks until those transfers are complete.

Requirements

See also

Send USB isochronous transfers from a WinUSB desktop app

WinUSB Functions

WinUsb_RegisterIsochBuffer