TcpCloseProc(
    ClientData instanceData,	/* The socket to close. */
    Tcl_Interp *interp)		/* Unused. */
{
    TcpState *statePtr = instanceData;
    /* TIP #218 */
    int errorCode = 0;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    /*
     * Check that WinSock is initialized; do not call it if not, to prevent
     * system crashes. This can happen at exit time if the exit handler for
     * WinSock ran before other exit handlers that want to use sockets.
     */

    if (statePtr->addrlist != NULL) {
        freeaddrinfo(statePtr->addrlist);
    }
    if (statePtr->myaddrlist != NULL) {
        freeaddrinfo(statePtr->myaddrlist);
    }

    /*
     * Clear an eventual tsd info list pointer.
     * This may be called, if an async socket connect fails or is closed
     * between connect and thread action callback.
     */
    if (tsdPtr->pendingTcpState != NULL
	    && tsdPtr->pendingTcpState == statePtr) {

	/* get infoPtr lock, because this concerns the notifier thread */
	WaitForSingleObject(tsdPtr->socketListLock, INFINITE);

	tsdPtr->pendingTcpState = NULL;

	/* Free list lock */
	SetEvent(tsdPtr->socketListLock);
    }

    /*
     * TIP #218. Removed the code removing the structure from the global
     * socket list. This is now done by the thread action callbacks, and only
     * there. This happens before this code is called. We can free without
     * fear of damaging the list.
     */

	    if (async_connect) {
		TcpState *statePtr2;
		int in_socket_list = 0;
		/* get statePtr lock */
		WaitForSingleObject(tsdPtr->socketListLock, INFINITE);

		/*
		 * Bugfig for 336441ed59 to not ignore notifications until the
		 * infoPtr is in the list.
		 * Check if my statePtr is already in the tsdPtr->socketList
		 * It is set after this call by TcpThreadActionProc and is set
		 * on a second round.
		 *
		 * If not, we buffer my statePtr in the tsd memory so it is not
		 * lost by the event procedure
		 */