Platform SDK: Windows Sockets

WPUOpenCurrentThread

The WPUOpenCurrentThread function opens a handle to the current thread that can be used with overlapped functions in a layered service provider. This is intended to be used by layered service providers that wish to initiate overlapped I/O from nonapplication threads.

INT WPUOpenCurrentThread (
  LPWSATHREADID   lpThreadId,   
  LPINT           lpErrno               
);

Parameters

lpThreadId: [out] Pointer to a WSATHREADID structure that can then be passed to an overlapped function.
lpErrno: [out] Pointer to the error code.

Return Values

If no error occurs, WPUOpenCurrentThread returns the zero. Otherwise, it returns SOCKET_ERROR, and a specific error code is available in lpErrno.

Remarks

The WPUOpenCurrentThread function provides a pointer to a WSATHREADID structure that can then be passed to an overlapped function such as WSPSend or WSPRecv. Layered service providers that use a private thread in one of the upper layers will use WPUOpenCurrentThread to pass a WSATHREADID pointer to the lower layer that is administering overlapped functions.

Overlapped functions such as WSPSend and WSPRecv can then be used in the same way as a regular service provider.

Every call to WPUOpenCurrentThread must have a corresponding call to WPUCloseThread.

Error Codes

Error code	Meaning
WSANOTINITIALISED	A successful WSPStartup call must occur before using this function.

Requirements