* Declarations for functions used only in this file.
 */

static int		ConsoleBlockModeProc(ClientData instanceData,
			    int mode);
static void		ConsoleCheckProc(ClientData clientData, int flags);
static int		ConsoleCloseProc(ClientData instanceData,
			    Tcl_Interp *interp, int flags);
static int		ConsoleEventProc(Tcl_Event *evPtr, int flags);
static void		ConsoleExitHandler(ClientData clientData);
static int		ConsoleGetHandleProc(ClientData instanceData,
			    int direction, ClientData *handlePtr);
static int		ConsoleGetOptionProc(ClientData instanceData,
			    Tcl_Interp *interp, const char *optionName,
			    Tcl_DString *dsPtr);

 * This structure describes the channel type structure for command console
 * based IO.
 */

static const Tcl_ChannelType consoleChannelType = {
    "console",			/* Type name. */
    TCL_CHANNEL_VERSION_5,	/* v5 channel */
    NULL,		/* Close proc. */
    ConsoleInputProc,		/* Input proc. */
    ConsoleOutputProc,		/* Output proc. */
    NULL,			/* Seek proc. */
    ConsoleSetOptionProc,	/* Set option proc. */
    ConsoleGetOptionProc,	/* Get option proc. */
    ConsoleWatchProc,		/* Set up notifier to watch the channel. */
    ConsoleGetHandleProc,	/* Get an OS handle from channel. */
    ConsoleCloseProc,		/* close2proc. */
    ConsoleBlockModeProc,	/* Set blocking or non-blocking mode. */
    NULL,			/* Flush proc. */
    NULL,			/* Handler proc. */
    NULL,			/* Wide seek proc. */
    ConsoleThreadActionProc,	/* Thread action proc. */
    NULL			/* Truncation proc. */
};

 *
 *----------------------------------------------------------------------
 */

static int
ConsoleCloseProc(
    ClientData instanceData,	/* Pointer to ConsoleInfo structure. */
    Tcl_Interp *dummy,		/* For error reporting. */
    int flags)
{
    ConsoleInfo *consolePtr = (ConsoleInfo *)instanceData;
    int errorCode = 0;
    ConsoleInfo *infoPtr, **nextPtrPtr;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
    (void)dummy;

    if ((flags & (TCL_CLOSE_READ | TCL_CLOSE_WRITE)) != 0) {
	return EINVAL;
    }

    /*
     * Clean up the background thread if necessary. Note that this must be
     * done before we can close the file, since the thread may be blocking
     * trying to read from the console.
     */