/*
 * tclWinSerial.c --
 *
 *	This file implements the Windows-specific serial port functions, and
 *	the "serial" channel driver.
 *
 * Copyright (c) 1999 by Scriptics Corp.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * Serial functionality implemented by Rolf.Schroedter@dlr.de
 *
 * RCS: @(#) $Id: tclWinSerial.c,v 1.35 2007/04/20 06:11:00 kennykb Exp $
 * RCS: @(#) $Id: tclWinSerial.c,v 1.35.2.1 2008/01/23 16:42:26 dgp Exp $
 */

#include "tclWinInt.h"

#include <fcntl.h>
#include <io.h>
#include <sys/stat.h>

		Tcl_MutexUnlock(&serialMutex);
	    }
	}

	CloseHandle(serialPtr->writeThread);
	CloseHandle(serialPtr->osWrite.hEvent);
	DeleteCriticalSection(&serialPtr->csWrite);
	CloseHandle(serialPtr->evWritable);
	CloseHandle(serialPtr->evStartWriter);
	CloseHandle(serialPtr->evStopWriter);
	serialPtr->writeThread = NULL;

	PurgeComm(serialPtr->handle, PURGE_TXABORT | PURGE_TXCLEAR);
    }
    serialPtr->validMask &= ~TCL_WRITABLE;

    DeleteCriticalSection(&serialPtr->csWrite);

    /*
     * Don't close the Win32 handle if the handle is a standard channel during
     * the thread exit process. Otherwise, one thread may kill the stdio of
     * another.
     */

    /*
     * Default is blocking.
     */

    SetCommTimeouts(handle, &no_timeout);

    InitializeCriticalSection(&infoPtr->csWrite);
    if (permissions & TCL_READABLE) {
	infoPtr->osRead.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
    }
    if (permissions & TCL_WRITABLE) {
	/*
	 * Initially the channel is writable and the writeThread is idle.
	 */

	infoPtr->osWrite.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
	infoPtr->evWritable = CreateEvent(NULL, TRUE, TRUE, NULL);
	infoPtr->evStartWriter = CreateEvent(NULL, FALSE, FALSE, NULL);
	infoPtr->evStopWriter = CreateEvent(NULL, FALSE, FALSE, NULL);
	InitializeCriticalSection(&infoPtr->csWrite);
	infoPtr->writeThread = CreateThread(NULL, 256, SerialWriterThread,
		infoPtr, 0, &id);
    }

    /*
     * Files have default translation of AUTO and ^Z eof char, which means
     * that a ^Z will be accepted as EOF when reading.