Win_QextSerialPort Class Reference

#include <win_qextserialport.h>

Inheritance diagram for Win_QextSerialPort:

QextSerialBase QIODevice QextBaseType QextSerialPort List of all members.

Public Types

 EventDriven
 Polling
enum  QueryMode { Polling, EventDriven }

Signals

void dsrChanged (bool status)

Public Member Functions

 aboutToClose ()
 atEnd ()
virtual bool atEnd () const
virtual BaudRateType baudRate () const
virtual qint64 bytesAvailable ()
 bytesToWrite ()
virtual qint64 bytesToWrite () const
 bytesWritten (qint64 bytes)
 canReadLine ()
virtual void close ()
virtual void construct ()
virtual DataBitsType dataBits () const
 errorString ()
virtual FlowType flowControl () const
virtual void flush ()
 getChar (char *c)
 isOpen ()
 isReadable ()
 isSequential ()
virtual bool isSequential () const
 isTextModeEnabled ()
 isWritable ()
virtual ulong lastError () const
virtual ulong lineStatus (void)
virtual bool open (OpenMode mode)
 openMode ()
Win_QextSerialPort & operator= (const Win_QextSerialPort &s)
virtual ParityType parity () const
 peek (qint64 maxSize)
 peek (char *data, qint64 maxSize)
virtual QString portName () const
 pos ()
 putChar (char c)
QextSerialBase::QueryMode queryMode () const
 read (qint64 maxSize)
 read (char *data, qint64 maxSize)
 readAll ()
 readLine (qint64 maxSize=0)
virtual qint64 readLine (char *data, qint64 maxSize)
 readLineData (char *data, qint64 maxSize)
 readyRead ()
 reset ()
 seek (qint64 pos)
virtual void setBaudRate (BaudRateType)
virtual void setDataBits (DataBitsType)
virtual void setDtr (bool set=true)
 setErrorString (const QString &str)
virtual void setFlowControl (FlowType)
 setOpenMode (OpenMode openMode)
virtual void setParity (ParityType)
virtual void setPortName (const QString &name)
virtual void setQueryMode (QueryMode mode)
virtual void setRts (bool set=true)
virtual void setStopBits (StopBitsType)
 setTextModeEnabled (bool enabled)
virtual void setTimeout (ulong, ulong)
 size ()
virtual qint64 size () const
virtual StopBitsType stopBits () const
virtual void translateError (ulong)
virtual void ungetChar (char c)
 waitForBytesWritten (int msecs)
virtual bool waitForReadyRead (int msecs)
 Win_QextSerialPort (const QString &name, const PortSettings &settings, QextSerialBase::QueryMode mode=QextSerialBase::Polling)
 Win_QextSerialPort (const PortSettings &settings, QextSerialBase::QueryMode mode=QextSerialBase::Polling)
 Win_QextSerialPort (const QString &name, QextSerialBase::QueryMode mode=QextSerialBase::Polling)
 Win_QextSerialPort (Win_QextSerialPort const &s)
 Win_QextSerialPort ()
 write (const QByteArray &byteArray)
 write (const char *data, qint64 maxSize)
virtual ~Win_QextSerialPort ()

Protected Member Functions

void monitorCommEvent ()
virtual qint64 readData (char *data, qint64 maxSize)
void terminateCommWait ()
virtual qint64 writeData (const char *data, qint64 maxSize)

Protected Attributes

qint64 _bytesToWrite
QextSerialBase::QueryMode _queryMode
QReadWriteLock * bytesToWriteLock
ulong lastErr
QMutex * mutex
OVERLAPPED overlap
Win_QextSerialThread * overlapThread
OVERLAPPED overlapWrite
QString port
PortSettings Settings
HANDLE threadStartEvent
HANDLE threadTerminateEvent
COMMCONFIG Win_CommConfig
COMMTIMEOUTS Win_CommTimeouts
HANDLE Win_Handle

Private Member Functions

void init ()

Friends

class Win_QextSerialThread

Detailed Description

Author:
Stefan Sander

Michal Policht

A cross-platform serial port class. This class encapsulates the Windows portion of QextSerialPort. The user will be notified of errors and possible portability conflicts at run-time by default - this behavior can be turned off by defining _TTY_NOWARN_ (to turn off all warnings) or _TTY_NOWARN_PORT_ (to turn off portability warnings) in the project. Note that defining _TTY_NOWARN_ also defines _TTY_NOWARN_PORT_.

Note:
On Windows NT/2000/XP this class uses Win32 serial port functions by default. The user may select POSIX behavior under NT, 2000, or XP ONLY by defining _TTY_POSIX_ in the project. I can make no guarantees as to the quality of POSIX support under NT/2000 however.
Todo:
rapair copy constructor and assign operator.

Member Enumeration Documentation

enum QextSerialBase::QueryMode [inherited]

Enumerator:
Polling 
EventDriven 

Reimplemented in QextSerialPort.

00154                        {
00155             Polling,
00156             EventDriven
00157         };

Constructor & Destructor Documentation

Win_QextSerialPort::Win_QextSerialPort (  ) 

Default constructor. Note that the name of the device used by a Win_QextSerialPort constructed with this constructor will be determined by defined constants, or lack thereof - the default behavior is the same as _TTY_LINUX_. Possible naming conventions and their associated constants are:

Constant         Used By         Naming Convention
----------       -------------   ------------------------
_TTY_WIN_        Windows         COM1, COM2
_TTY_IRIX_       SGI/IRIX        /dev/ttyf1, /dev/ttyf2
_TTY_HPUX_       HP-UX           /dev/tty1p0, /dev/tty2p0
_TTY_SUN_        SunOS/Solaris   /dev/ttya, /dev/ttyb
_TTY_DIGITAL_    Digital UNIX    /dev/tty01, /dev/tty02
_TTY_FREEBSD_    FreeBSD         /dev/ttyd0, /dev/ttyd1
_TTY_LINUX_      Linux           /dev/ttyS0, /dev/ttyS1
<none>           Linux           /dev/ttyS0, /dev/ttyS1

This constructor associates the object with the first port on the system, e.g. COM1 for Windows platforms. See the other constructor if you need a port other than the first. 

00033                                       :
00034     QextSerialBase() 
00035 {
00036     Win_Handle=INVALID_HANDLE_VALUE;
00037     init();
00038 }

Win_QextSerialPort::Win_QextSerialPort ( Win_QextSerialPort const &  s  ) 

Win_QextSerialPort::Win_QextSerialPort(const Win_QextSerialPort&) Copy constructor. 

00043                                                                  :
00044     QextSerialBase(s.port) 
00045 {
00046     Win_Handle=INVALID_HANDLE_VALUE;
00047     _queryMode = s._queryMode;
00048     _bytesToWrite = s._bytesToWrite;
00049     bytesToWriteLock = new QReadWriteLock;
00050     overlapThread = new Win_QextSerialThread(this);
00051     memcpy(& overlap, & s.overlap, sizeof(OVERLAPPED));
00052     memcpy(& overlapWrite, & s.overlapWrite, sizeof(OVERLAPPED));
00053     setOpenMode(s.openMode());
00054     lastErr=s.lastErr;
00055     port = s.port;
00056     Settings.FlowControl=s.Settings.FlowControl;
00057     Settings.Parity=s.Settings.Parity;
00058     Settings.DataBits=s.Settings.DataBits;
00059     Settings.StopBits=s.Settings.StopBits;
00060     Settings.BaudRate=s.Settings.BaudRate;
00061     Win_Handle=s.Win_Handle;
00062     memcpy(&Win_CommConfig, &s.Win_CommConfig, sizeof(COMMCONFIG));
00063     memcpy(&Win_CommTimeouts, &s.Win_CommTimeouts, sizeof(COMMTIMEOUTS));
00064     if (s.overlapThread->isRunning())
00065         overlapThread->start();
00066 }

Win_QextSerialPort::Win_QextSerialPort ( const QString &  name,
QextSerialBase::QueryMode  mode = QextSerialBase::Polling 
) 

00074                                                                                         :
00075     QextSerialBase(name) 
00076 {
00077     Win_Handle=INVALID_HANDLE_VALUE;
00078     setQueryMode(mode);
00079     init();
00080 }

Win_QextSerialPort::Win_QextSerialPort ( const PortSettings &  settings,
QextSerialBase::QueryMode  mode = QextSerialBase::Polling 
) 

00086                                                                                                  {
00087     Win_Handle=INVALID_HANDLE_VALUE;
00088     setBaudRate(settings.BaudRate);
00089     setDataBits(settings.DataBits);
00090     setStopBits(settings.StopBits);
00091     setParity(settings.Parity);
00092     setFlowControl(settings.FlowControl);
00093     setTimeout(settings.Timeout_Sec, settings.Timeout_Millisec);
00094     setQueryMode(mode);
00095     init();
00096 }

Win_QextSerialPort::Win_QextSerialPort ( const QString &  name,
const PortSettings &  settings,
QextSerialBase::QueryMode  mode = QextSerialBase::Polling 
) 

00102                                                                                                                        {
00103     Win_Handle=INVALID_HANDLE_VALUE;
00104     setPortName(name);
00105     setBaudRate(settings.BaudRate);
00106     setDataBits(settings.DataBits);
00107     setStopBits(settings.StopBits);
00108     setParity(settings.Parity);
00109     setFlowControl(settings.FlowControl);
00110     setTimeout(settings.Timeout_Sec, settings.Timeout_Millisec);
00111     setQueryMode(mode);
00112     init();
00113 }

Win_QextSerialPort::~Win_QextSerialPort (  )  [virtual]

Standard destructor. 

00131                                         {
00132     if (isOpen()) {
00133         close();
00134     }
00135     CloseHandle(overlap.hEvent);
00136     delete overlapThread;
00137     delete bytesToWriteLock; 
00138 }

Member Function Documentation

bool QextSerialBase::atEnd (  )  const [virtual, inherited]

This function will return true if the input buffer is empty (or on error), and false otherwise. Call QextSerialBase::lastError() for error information. 

00164 {
00165     if (size()) {
00166         return true;
00167     }
00168     return false;
00169 }

BaudRateType QextSerialBase::baudRate ( void   )  const [virtual, inherited]

Returns the baud rate of the serial port. For a list of possible return values see the definition of the enum BaudRateType. 

00103 {
00104     return Settings.BaudRate;
00105 }

qint64 Win_QextSerialPort::bytesAvailable (  )  [virtual]

Returns the number of bytes waiting in the port's receive queue. This function will return 0 if the port is not currently open, or -1 on error. Error information can be retrieved by calling Win_QextSerialPort::getLastError().

Implements QextSerialBase.

00287                                           {
00288     LOCK_MUTEX();
00289     if (isOpen()) {
00290         DWORD Errors;
00291         COMSTAT Status;
00292         bool success=ClearCommError(Win_Handle, &Errors, &Status);
00293         translateError(Errors);
00294         if (success) {
00295             lastErr=E_NO_ERROR;
00296             UNLOCK_MUTEX();
00297             return Status.cbInQue + QIODevice::bytesAvailable();
00298         }
00299         UNLOCK_MUTEX();
00300         return (unsigned int)-1;
00301     }
00302     UNLOCK_MUTEX();
00303     return 0;
00304 }

qint64 Win_QextSerialPort::bytesToWrite (  )  const [virtual]

Return number of bytes waiting in the buffer. Currently this shows number of bytes queued within write() and before the TX_EMPTY event occured. TX_EMPTY event is created whenever last character in the system buffer was sent.

Returns:
number of bytes queued within write(), before the first TX_EMPTY event occur.
Warning:
this function may not give you expected results since TX_EMPTY may occur while writing data to the buffer. Eventually some TX_EMPTY events may not be catched.
Note:
this function always returns 0 in polling mode.
See also:
flush(). 
00954 {
00955     return _bytesToWrite;
00956 }

void Win_QextSerialPort::close (  )  [virtual]

Closes a serial port. This function has no effect if the serial port associated with the class is not currently open.

Implements QextSerialBase.

00233 {
00234     LOCK_MUTEX();
00235 
00236     if (isOpen()) {
00237         flush();
00238         if (overlapThread->isRunning()) {
00239             overlapThread->stop();
00240             if (QThread::currentThread() != overlapThread)
00241                 overlapThread->wait();
00242         }
00243         if (CloseHandle(Win_Handle))
00244             Win_Handle = INVALID_HANDLE_VALUE;
00245         _bytesToWrite = 0;
00246         QIODevice::close();
00247     }
00248 
00249     UNLOCK_MUTEX();
00250 }

void QextSerialBase::construct (  )  [virtual, inherited]

Common constructor function for setting up default port settings. (115200 Baud, 8N1, Hardware flow control where supported, otherwise no flow control, and 0 ms timeout). 

00062 {
00063     Settings.BaudRate=BAUD115200;
00064     Settings.DataBits=DATA_8;
00065     Settings.Parity=PAR_NONE;
00066     Settings.StopBits=STOP_1;
00067     Settings.FlowControl=FLOW_HARDWARE;
00068     Settings.Timeout_Sec=0;
00069     Settings.Timeout_Millisec=0;
00070     mutex = new QMutex( QMutex::Recursive );
00071     setOpenMode(QIODevice::NotOpen);
00072 }

DataBitsType QextSerialBase::dataBits (  )  const [virtual, inherited]

Returns the number of data bits used by the port. For a list of possible values returned by this function, see the definition of the enum DataBitsType. 

00113 {
00114     return Settings.DataBits;
00115 }

void QextSerialBase::dsrChanged ( bool  status  )  [signal, inherited]

This signal is emitted whenever dsr line has changed its state. You may use this signal to check if device is connected.

Parameters:
status true when DSR signal is on, false otherwise.
See also:
lineStatus().

FlowType QextSerialBase::flowControl (  )  const [virtual, inherited]

Returns the type of flow control used by the port. For a list of possible values returned by this function, see the definition of the enum FlowType. 

00143 {
00144     return Settings.FlowControl;
00145 }

void Win_QextSerialPort::flush (  )  [virtual]

Flushes all pending I/O to the serial port. This function has no effect if the serial port associated with the class is not currently open.

Implements QextSerialBase.

00257                                {
00258     LOCK_MUTEX();
00259     if (isOpen()) {
00260         FlushFileBuffers(Win_Handle);
00261     }
00262     UNLOCK_MUTEX();
00263 }

void Win_QextSerialPort::init (  )  [private]

This method is a part of constructor. 

00116 {
00117     _bytesToWrite = 0;
00118     overlap.Internal = 0;
00119     overlap.InternalHigh = 0;
00120     overlap.Offset = 0;
00121     overlap.OffsetHigh = 0;
00122     overlap.hEvent = CreateEvent(NULL, true, false, NULL);
00123     overlapThread = new Win_QextSerialThread(this);
00124     bytesToWriteLock = new QReadWriteLock;
00125 }

bool QextSerialBase::isSequential (  )  const [virtual, inherited]

Returns true if device is sequential, otherwise returns false. Serial port is sequential device so this function always returns true. Check QIODevice::isSequential() documentation for more information. 

00154 {
00155     return true;
00156 }

ulong QextSerialBase::lastError (  )  const [virtual, inherited]

Returns the code for the last error encountered by the port, or E_NO_ERROR if the last port operation was successful. Possible error codes are:

Error                           Explanation
---------------------------     -------------------------------------------------------------
E_NO_ERROR                      No Error has occured
E_INVALID_FD                    Invalid file descriptor (port was not opened correctly)
E_NO_MEMORY                     Unable to allocate memory tables (POSIX)
E_CAUGHT_NON_BLOCKED_SIGNAL     Caught a non-blocked signal (POSIX)
E_PORT_TIMEOUT                  Operation timed out (POSIX)
E_INVALID_DEVICE                The file opened by the port is not a character device (POSIX)
E_BREAK_CONDITION               The port detected a break condition
E_FRAMING_ERROR                 The port detected a framing error
                                (usually caused by incorrect baud rate settings)
E_IO_ERROR                      There was an I/O error while communicating with the port
E_BUFFER_OVERRUN                Character buffer overrun
E_RECEIVE_OVERFLOW              Receive buffer overflow
E_RECEIVE_PARITY_ERROR          The port detected a parity error in the received data
E_TRANSMIT_OVERFLOW             Transmit buffer overflow
E_READ_FAILED                   General read operation failure
E_WRITE_FAILED                  General write operation failure

00225 {
00226     return lastErr;
00227 }

ulong Win_QextSerialPort::lineStatus ( void   )  [virtual]

returns the line status as stored by the port function. This function will retrieve the states of the following lines: DCD, CTS, DSR, and RI. On POSIX systems, the following additional lines can be monitored: DTR, RTS, Secondary TXD, and Secondary RXD. The value returned is an unsigned long with specific bits indicating which lines are high. The following constants should be used to examine the states of individual lines:

Mask        Line
------      ----
LS_CTS      CTS
LS_DSR      DSR
LS_DCD      DCD
LS_RI       RI

This function will return 0 if the port associated with the class is not currently open.

Implements QextSerialBase.

00925                                          {
00926     unsigned long Status=0, Temp=0;
00927     LOCK_MUTEX();
00928     if (isOpen()) {
00929         GetCommModemStatus(Win_Handle, &Temp);
00930         if (Temp&MS_CTS_ON) {
00931             Status|=LS_CTS;
00932         }
00933         if (Temp&MS_DSR_ON) {
00934             Status|=LS_DSR;
00935         }
00936         if (Temp&MS_RING_ON) {
00937             Status|=LS_RI;
00938         }
00939         if (Temp&MS_RLSD_ON) {
00940             Status|=LS_DCD;
00941         }
00942     }
00943     UNLOCK_MUTEX();
00944     return Status;
00945 }

void Win_QextSerialPort::monitorCommEvent (  )  [protected] 

00959 {
00960     DWORD eventMask = 0;
00961 
00962     ResetEvent(overlap.hEvent);
00963     if (!WaitCommEvent(Win_Handle, & eventMask, & overlap))
00964         if (GetLastError() != ERROR_IO_PENDING)
00965             qCritical("WaitCommEvent error %ld\n", GetLastError());
00966 
00967     if (WaitForSingleObject(overlap.hEvent, INFINITE) == WAIT_OBJECT_0) {
00968         //overlap event occured
00969         DWORD undefined;
00970         if (!GetOverlappedResult(Win_Handle, & overlap, & undefined, false)) {
00971             qWarning("Comm event overlapped error %ld", GetLastError());
00972             return;
00973         }
00974         if (eventMask & EV_RXCHAR) {
00975             if (sender() != this)
00976                 emit readyRead();
00977         }
00978         if (eventMask & EV_TXEMPTY) {
00979             DWORD numBytes;
00980             GetOverlappedResult(Win_Handle, & overlapWrite, & numBytes, true);
00981             bytesToWriteLock->lockForWrite();
00982             if (sender() != this)
00983                 emit bytesWritten(bytesToWrite());
00984             _bytesToWrite = 0;
00985             bytesToWriteLock->unlock();
00986         }
00987         if (eventMask & EV_DSR)
00988             if (lineStatus() & LS_DSR)
00989                 emit dsrChanged(true);
00990             else
00991                 emit dsrChanged(false);
00992     }
00993 }

bool Win_QextSerialPort::open ( OpenMode  mode  )  [virtual]

Opens a serial port. Note that this function does not specify which device to open. If you need to open a device by name, see Win_QextSerialPort::open(const char*). This function has no effect if the port associated with the class is already open. The port is also configured to the current settings, as stored in the Settings structure.

Implements QextSerialBase.

00175                                            {
00176     unsigned long confSize = sizeof(COMMCONFIG);
00177     Win_CommConfig.dwSize = confSize;
00178     DWORD dwFlagsAndAttributes = 0;
00179     if (queryMode() == QextSerialBase::EventDriven)
00180         dwFlagsAndAttributes += FILE_FLAG_OVERLAPPED;
00181 
00182     LOCK_MUTEX();
00183     if (mode == QIODevice::NotOpen)
00184         return isOpen();
00185     if (!isOpen()) {
00186         /*open the port*/
00187         Win_Handle=CreateFileA(port.toAscii(), GENERIC_READ|GENERIC_WRITE,
00188                               FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, dwFlagsAndAttributes, NULL);
00189         if (Win_Handle!=INVALID_HANDLE_VALUE) {
00190             /*configure port settings*/
00191             GetCommConfig(Win_Handle, &Win_CommConfig, &confSize);
00192             GetCommState(Win_Handle, &(Win_CommConfig.dcb));
00193 
00194             /*set up parameters*/
00195             Win_CommConfig.dcb.fBinary=TRUE;
00196             Win_CommConfig.dcb.fInX=FALSE;
00197             Win_CommConfig.dcb.fOutX=FALSE;
00198             Win_CommConfig.dcb.fAbortOnError=FALSE;
00199             Win_CommConfig.dcb.fNull=FALSE;
00200             setBaudRate(Settings.BaudRate);
00201             setDataBits(Settings.DataBits);
00202             setStopBits(Settings.StopBits);
00203             setParity(Settings.Parity);
00204             setFlowControl(Settings.FlowControl);
00205             setTimeout(Settings.Timeout_Sec, Settings.Timeout_Millisec);
00206             SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00207             
00208             //init event driven approach
00209             if (queryMode() == QextSerialBase::EventDriven) {
00210                 if (!SetCommMask( Win_Handle, EV_TXEMPTY | EV_RXCHAR | EV_DSR)) {
00211                     qWarning("Failed to set Comm Mask. Error code: %ld", GetLastError());
00212                     UNLOCK_MUTEX();
00213                     return false;
00214                 }
00215                 overlapThread->start();
00216             }
00217             QIODevice::open(mode);
00218         }
00219     } else {
00220         UNLOCK_MUTEX();
00221         return false;
00222     }
00223     UNLOCK_MUTEX();
00224     return isOpen();
00225 }

Win_QextSerialPort & Win_QextSerialPort::operator= ( const Win_QextSerialPort &  s  ) 

overrides the = operator 

00144                                                                              {
00145     setOpenMode(s.openMode());
00146     _queryMode = s._queryMode;
00147     _bytesToWrite = s._bytesToWrite;
00148     bytesToWriteLock = new QReadWriteLock;
00149     overlapThread = new Win_QextSerialThread(this);
00150     memcpy(& overlap, & s.overlap, sizeof(OVERLAPPED));
00151     memcpy(& overlapWrite, & s.overlapWrite, sizeof(OVERLAPPED));
00152     lastErr=s.lastErr;
00153     port = s.port;
00154     Settings.FlowControl=s.Settings.FlowControl;
00155     Settings.Parity=s.Settings.Parity;
00156     Settings.DataBits=s.Settings.DataBits;
00157     Settings.StopBits=s.Settings.StopBits;
00158     Settings.BaudRate=s.Settings.BaudRate;
00159     Win_Handle=s.Win_Handle;
00160     memcpy(&Win_CommConfig, &s.Win_CommConfig, sizeof(COMMCONFIG));
00161     memcpy(&Win_CommTimeouts, &s.Win_CommTimeouts, sizeof(COMMTIMEOUTS));
00162     if (s.overlapThread->isRunning())
00163         overlapThread->start();
00164     return *this;
00165 }

ParityType QextSerialBase::parity (  )  const [virtual, inherited]

Returns the type of parity used by the port. For a list of possible values returned by this function, see the definition of the enum ParityType. 

00123 {
00124     return Settings.Parity;
00125 }

QString QextSerialBase::portName (  )  const [virtual, inherited]

Returns the name set by setPortName(). 

00093 {
00094     return port;
00095 }

QextSerialBase::QueryMode QextSerialBase::queryMode (  )  const [inline, inherited] 

00176 { return _queryMode; };

qint64 Win_QextSerialPort::readData ( char *  data,
qint64  maxSize 
) [protected, virtual]

Reads a block of data from the serial port. This function will read at most maxlen bytes from the serial port and place them in the buffer pointed to by data. Return value is the number of bytes actually read, or -1 on error.

Warning:
before calling this function ensure that serial port associated with this class is currently open (use isOpen() function to check if port is open).

Implements QextSerialBase.

00347 {
00348     DWORD retVal;
00349     
00350     LOCK_MUTEX();
00351     
00352     retVal = 0;
00353     if (queryMode() == QextSerialBase::EventDriven) {
00354         COMSTAT Win_ComStat;
00355         DWORD Win_ErrorMask = 0;
00356         OVERLAPPED overlapRead;
00357         overlapRead.Internal = 0;
00358         overlapRead.InternalHigh = 0;
00359         overlapRead.Offset = 0;
00360         overlapRead.OffsetHigh = 0;
00361         overlapRead.hEvent = CreateEvent(NULL, true, false, NULL);
00362         ClearCommError(Win_Handle, & Win_ErrorMask, & Win_ComStat);
00363         //actually in overlapped mode maxSize acts as minSize...
00364         maxSize = qMin((qint64)Win_ComStat.cbInQue, maxSize);
00365         if (!ReadFile(Win_Handle, (void*)data, (DWORD)maxSize, & retVal, & overlapRead)) {
00366             if (GetLastError() == ERROR_IO_PENDING)
00367                 GetOverlappedResult(Win_Handle, & overlapRead, & retVal, true);
00368             else {
00369                 lastErr = E_READ_FAILED;
00370                 retVal = (DWORD)-1;
00371             }
00372         }
00373         CloseHandle(overlapRead.hEvent);
00374     } else if (!ReadFile(Win_Handle, (void*)data, (DWORD)maxSize, & retVal, NULL)) {
00375         lastErr = E_READ_FAILED;
00376         retVal = (DWORD)-1;
00377     }
00378 
00379     UNLOCK_MUTEX();
00380 
00381     return (qint64)retVal;
00382 }

qint64 QextSerialBase::readLine ( char *  data,
qint64  maxSize 
) [virtual, inherited]

This function will read a line of buffered input from the port, stopping when either maxSize bytes have been read, the port has no more data available, or a newline is encountered. The value returned is the length of the string that was read.

Reimplemented from QIODevice.

00178 {
00179     qint64 numBytes = bytesAvailable();
00180     char* pData = data;
00181 
00182     if (maxSize < 2)    //maxSize must be larger than 1
00183         return -1;
00184 
00185     /*read a byte at a time for MIN(bytesAvail, maxSize - 1) iterations, or until a newline*/
00186     while (pData<(data+numBytes) && --maxSize) {
00187         readData(pData, 1);
00188         if (*pData++ == '\n') {
00189             break;
00190         }
00191     }
00192     *pData='\0';
00193 
00194     /*return size of data read*/
00195     return (pData-data);
00196 }

void Win_QextSerialPort::setBaudRate ( BaudRateType  baudRate  )  [virtual]

Sets the baud rate of the serial port. Note that not all rates are applicable on all platforms. The following table shows translations of the various baud rate constants on Windows(including NT/2000) and POSIX platforms. Speeds marked with an * are speeds that are usable on both Windows and POSIX. 

  RATE          Windows Speed   POSIX Speed
  -----------   -------------   -----------
   BAUD50                 110          50
   BAUD75                 110          75
  *BAUD110                110         110
   BAUD134                110         134.5
   BAUD150                110         150
   BAUD200                110         200
  *BAUD300                300         300
  *BAUD600                600         600
  *BAUD1200              1200        1200
   BAUD1800              1200        1800
  *BAUD2400              2400        2400
  *BAUD4800              4800        4800
  *BAUD9600              9600        9600
   BAUD14400            14400        9600
  *BAUD19200            19200       19200
  *BAUD38400            38400       38400
   BAUD56000            56000       38400
  *BAUD57600            57600       57600
   BAUD76800            57600       76800
  *BAUD115200          115200      115200
   BAUD128000          128000      115200
   BAUD256000          256000      115200

Implements QextSerialBase.

00716                                                           {
00717     LOCK_MUTEX();
00718     if (Settings.BaudRate!=baudRate) {
00719         switch (baudRate) {
00720             case BAUD50:
00721             case BAUD75:
00722             case BAUD134:
00723             case BAUD150:
00724             case BAUD200:
00725                 Settings.BaudRate=BAUD110;
00726                 break;
00727 
00728             case BAUD1800:
00729                 Settings.BaudRate=BAUD1200;
00730                 break;
00731 
00732             case BAUD76800:
00733                 Settings.BaudRate=BAUD57600;
00734                 break;
00735 
00736             default:
00737                 Settings.BaudRate=baudRate;
00738                 break;
00739         }
00740     }
00741     if (isOpen()) {
00742         switch (baudRate) {
00743 
00744             /*50 baud*/
00745             case BAUD50:
00746                 TTY_WARNING("Win_QextSerialPort: Windows does not support 50 baud operation.  Switching to 110 baud.");
00747                 Win_CommConfig.dcb.BaudRate=CBR_110;
00748                 break;
00749 
00750             /*75 baud*/
00751             case BAUD75:
00752                 TTY_WARNING("Win_QextSerialPort: Windows does not support 75 baud operation.  Switching to 110 baud.");
00753                 Win_CommConfig.dcb.BaudRate=CBR_110;
00754                 break;
00755 
00756             /*110 baud*/
00757             case BAUD110:
00758                 Win_CommConfig.dcb.BaudRate=CBR_110;
00759                 break;
00760 
00761             /*134.5 baud*/
00762             case BAUD134:
00763                 TTY_WARNING("Win_QextSerialPort: Windows does not support 134.5 baud operation.  Switching to 110 baud.");
00764                 Win_CommConfig.dcb.BaudRate=CBR_110;
00765                 break;
00766 
00767             /*150 baud*/
00768             case BAUD150:
00769                 TTY_WARNING("Win_QextSerialPort: Windows does not support 150 baud operation.  Switching to 110 baud.");
00770                 Win_CommConfig.dcb.BaudRate=CBR_110;
00771                 break;
00772 
00773             /*200 baud*/
00774             case BAUD200:
00775                 TTY_WARNING("Win_QextSerialPort: Windows does not support 200 baud operation.  Switching to 110 baud.");
00776                 Win_CommConfig.dcb.BaudRate=CBR_110;
00777                 break;
00778 
00779             /*300 baud*/
00780             case BAUD300:
00781                 Win_CommConfig.dcb.BaudRate=CBR_300;
00782                 break;
00783 
00784             /*600 baud*/
00785             case BAUD600:
00786                 Win_CommConfig.dcb.BaudRate=CBR_600;
00787                 break;
00788 
00789             /*1200 baud*/
00790             case BAUD1200:
00791                 Win_CommConfig.dcb.BaudRate=CBR_1200;
00792                 break;
00793 
00794             /*1800 baud*/
00795             case BAUD1800:
00796                 TTY_WARNING("Win_QextSerialPort: Windows does not support 1800 baud operation.  Switching to 1200 baud.");
00797                 Win_CommConfig.dcb.BaudRate=CBR_1200;
00798                 break;
00799 
00800             /*2400 baud*/
00801             case BAUD2400:
00802                 Win_CommConfig.dcb.BaudRate=CBR_2400;
00803                 break;
00804 
00805             /*4800 baud*/
00806             case BAUD4800:
00807                 Win_CommConfig.dcb.BaudRate=CBR_4800;
00808                 break;
00809 
00810             /*9600 baud*/
00811             case BAUD9600:
00812                 Win_CommConfig.dcb.BaudRate=CBR_9600;
00813                 break;
00814 
00815             /*14400 baud*/
00816             case BAUD14400:
00817                 TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: POSIX does not support 14400 baud operation.");
00818                 Win_CommConfig.dcb.BaudRate=CBR_14400;
00819                 break;
00820 
00821             /*19200 baud*/
00822             case BAUD19200:
00823                 Win_CommConfig.dcb.BaudRate=CBR_19200;
00824                 break;
00825 
00826             /*38400 baud*/
00827             case BAUD38400:
00828                 Win_CommConfig.dcb.BaudRate=CBR_38400;
00829                 break;
00830 
00831             /*56000 baud*/
00832             case BAUD56000:
00833                 TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: POSIX does not support 56000 baud operation.");
00834                 Win_CommConfig.dcb.BaudRate=CBR_56000;
00835                 break;
00836 
00837             /*57600 baud*/
00838             case BAUD57600:
00839                 Win_CommConfig.dcb.BaudRate=CBR_57600;
00840                 break;
00841 
00842             /*76800 baud*/
00843             case BAUD76800:
00844                 TTY_WARNING("Win_QextSerialPort: Windows does not support 76800 baud operation.  Switching to 57600 baud.");
00845                 Win_CommConfig.dcb.BaudRate=CBR_57600;
00846                 break;
00847 
00848             /*115200 baud*/
00849             case BAUD115200:
00850                 Win_CommConfig.dcb.BaudRate=CBR_115200;
00851                 break;
00852 
00853             /*128000 baud*/
00854             case BAUD128000:
00855                 TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: POSIX does not support 128000 baud operation.");
00856                 Win_CommConfig.dcb.BaudRate=CBR_128000;
00857                 break;
00858 
00859             /*256000 baud*/
00860             case BAUD256000:
00861                 TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: POSIX does not support 256000 baud operation.");
00862                 Win_CommConfig.dcb.BaudRate=CBR_256000;
00863                 break;
00864         }
00865         SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00866     }
00867     UNLOCK_MUTEX();
00868 }

void Win_QextSerialPort::setDataBits ( DataBitsType  dataBits  )  [virtual]

Sets the number of data bits used by the serial port. Possible values of dataBits are: 

    DATA_5      5 data bits
    DATA_6      6 data bits
    DATA_7      7 data bits
    DATA_8      8 data bits

Note:
This function is subject to the following restrictions:
5 data bits cannot be used with 2 stop bits.
1.5 stop bits can only be used with 5 data bits.
8 data bits cannot be used with space parity on POSIX systems.

Implements QextSerialBase.

00557                                                           {
00558     LOCK_MUTEX();
00559     if (Settings.DataBits!=dataBits) {
00560         if ((Settings.StopBits==STOP_2 && dataBits==DATA_5) ||
00561             (Settings.StopBits==STOP_1_5 && dataBits!=DATA_5)) {
00562         }
00563         else {
00564             Settings.DataBits=dataBits;
00565         }
00566     }
00567     if (isOpen()) {
00568         switch(dataBits) {
00569 
00570             /*5 data bits*/
00571             case DATA_5:
00572                 if (Settings.StopBits==STOP_2) {
00573                     TTY_WARNING("Win_QextSerialPort: 5 Data bits cannot be used with 2 stop bits.");
00574                 }
00575                 else {
00576                     Win_CommConfig.dcb.ByteSize=5;
00577                     SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00578                 }
00579                 break;
00580 
00581             /*6 data bits*/
00582             case DATA_6:
00583                 if (Settings.StopBits==STOP_1_5) {
00584                     TTY_WARNING("Win_QextSerialPort: 6 Data bits cannot be used with 1.5 stop bits.");
00585                 }
00586                 else {
00587                     Win_CommConfig.dcb.ByteSize=6;
00588                     SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00589                 }
00590                 break;
00591 
00592             /*7 data bits*/
00593             case DATA_7:
00594                 if (Settings.StopBits==STOP_1_5) {
00595                     TTY_WARNING("Win_QextSerialPort: 7 Data bits cannot be used with 1.5 stop bits.");
00596                 }
00597                 else {
00598                     Win_CommConfig.dcb.ByteSize=7;
00599                     SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00600                 }
00601                 break;
00602 
00603             /*8 data bits*/
00604             case DATA_8:
00605                 if (Settings.StopBits==STOP_1_5) {
00606                     TTY_WARNING("Win_QextSerialPort: 8 Data bits cannot be used with 1.5 stop bits.");
00607                 }
00608                 else {
00609                     Win_CommConfig.dcb.ByteSize=8;
00610                     SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00611                 }
00612                 break;
00613         }
00614     }
00615     UNLOCK_MUTEX();
00616 }

void Win_QextSerialPort::setDtr ( bool  set = true  )  [virtual]

Sets DTR line to the requested state (high by default). This function will have no effect if the port associated with the class is not currently open.

Implements QextSerialBase.

00875                                         {
00876     LOCK_MUTEX();
00877     if (isOpen()) {
00878         if (set) {
00879             EscapeCommFunction(Win_Handle, SETDTR);
00880         }
00881         else {
00882             EscapeCommFunction(Win_Handle, CLRDTR);
00883         }
00884     }
00885     UNLOCK_MUTEX();
00886 }

void Win_QextSerialPort::setFlowControl ( FlowType  flow  )  [virtual]

Sets the flow control used by the port. Possible values of flow are: 

    FLOW_OFF            No flow control
    FLOW_HARDWARE       Hardware (RTS/CTS) flow control
    FLOW_XONXOFF        Software (XON/XOFF) flow control

Implements QextSerialBase.

00445                                                      {
00446     LOCK_MUTEX();
00447     if (Settings.FlowControl!=flow) {
00448         Settings.FlowControl=flow;
00449     }
00450     if (isOpen()) {
00451         switch(flow) {
00452 
00453             /*no flow control*/
00454             case FLOW_OFF:
00455                 Win_CommConfig.dcb.fOutxCtsFlow=FALSE;
00456                 Win_CommConfig.dcb.fRtsControl=RTS_CONTROL_DISABLE;
00457                 Win_CommConfig.dcb.fInX=FALSE;
00458                 Win_CommConfig.dcb.fOutX=FALSE;
00459                 SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00460                 break;
00461 
00462             /*software (XON/XOFF) flow control*/
00463             case FLOW_XONXOFF:
00464                 Win_CommConfig.dcb.fOutxCtsFlow=FALSE;
00465                 Win_CommConfig.dcb.fRtsControl=RTS_CONTROL_DISABLE;
00466                 Win_CommConfig.dcb.fInX=TRUE;
00467                 Win_CommConfig.dcb.fOutX=TRUE;
00468                 SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00469                 break;
00470 
00471             case FLOW_HARDWARE:
00472                 Win_CommConfig.dcb.fOutxCtsFlow=TRUE;
00473                 Win_CommConfig.dcb.fRtsControl=RTS_CONTROL_HANDSHAKE;
00474                 Win_CommConfig.dcb.fInX=FALSE;
00475                 Win_CommConfig.dcb.fOutX=FALSE;
00476                 SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00477                 break;
00478         }
00479     }
00480     UNLOCK_MUTEX();
00481 }

void Win_QextSerialPort::setParity ( ParityType  parity  )  [virtual]

Sets the parity associated with the serial port. The possible values of parity are: 

    PAR_SPACE       Space Parity
    PAR_MARK        Mark Parity
    PAR_NONE        No Parity
    PAR_EVEN        Even Parity
    PAR_ODD         Odd Parity

Implements QextSerialBase.

00494                                                     {
00495     LOCK_MUTEX();
00496     if (Settings.Parity!=parity) {
00497         Settings.Parity=parity;
00498     }
00499     if (isOpen()) {
00500         Win_CommConfig.dcb.Parity=(unsigned char)parity;
00501         switch (parity) {
00502 
00503             /*space parity*/
00504             case PAR_SPACE:
00505                 if (Settings.DataBits==DATA_8) {
00506                     TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: Space parity with 8 data bits is not supported by POSIX systems.");
00507                 }
00508                 Win_CommConfig.dcb.fParity=TRUE;
00509                 break;
00510 
00511             /*mark parity - WINDOWS ONLY*/
00512             case PAR_MARK:
00513                 TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning:  Mark parity is not supported by POSIX systems");
00514                 Win_CommConfig.dcb.fParity=TRUE;
00515                 break;
00516 
00517             /*no parity*/
00518             case PAR_NONE:
00519                 Win_CommConfig.dcb.fParity=FALSE;
00520                 break;
00521 
00522             /*even parity*/
00523             case PAR_EVEN:
00524                 Win_CommConfig.dcb.fParity=TRUE;
00525                 break;
00526 
00527             /*odd parity*/
00528             case PAR_ODD:
00529                 Win_CommConfig.dcb.fParity=TRUE;
00530                 break;
00531         }
00532         SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00533     }
00534     UNLOCK_MUTEX();
00535 }

void QextSerialBase::setPortName ( const QString &  name  )  [virtual, inherited]

Sets the name of the device associated with the object, e.g. "COM1", or "/dev/ttyS0". 

00084 {
00085     port = name;
00086 }

void QextSerialBase::setQueryMode ( QueryMode  mode  )  [virtual, inherited]

Set desired serial communication handling style. You may choose from polling or event driven approach. This function does nothing when port is open; to apply changes port must be reopened.

In event driven approach read() and write() functions are acting asynchronously. They return immediately and the operation is performed in the background, so they doesn't freeze the calling thread. To determine when operation is finished, QextSerialPort runs separate thread and monitors serial port events. Whenever the event occurs, adequate signal is emitted.

When polling is set, read() and write() are acting synchronously. Signals are not working in this mode and some functions may not be available. The advantage of polling is that it generates less overhead due to lack of signals emissions and it doesn't start separate thread to monitor events.

Generally event driven approach is more capable and friendly, although some applications may need as low overhead as possible and then polling comes.

Parameters:
mode query mode. 
00075 {
00076     _queryMode = mechanism;
00077 }

void Win_QextSerialPort::setRts ( bool  set = true  )  [virtual]

Sets RTS line to the requested state (high by default). This function will have no effect if the port associated with the class is not currently open.

Implements QextSerialBase.

00893                                         {
00894     LOCK_MUTEX();
00895     if (isOpen()) {
00896         if (set) {
00897             EscapeCommFunction(Win_Handle, SETRTS);
00898         }
00899         else {
00900             EscapeCommFunction(Win_Handle, CLRRTS);
00901         }
00902     }
00903     UNLOCK_MUTEX();
00904 }

void Win_QextSerialPort::setStopBits ( StopBitsType  stopBits  )  [virtual]

Sets the number of stop bits used by the serial port. Possible values of stopBits are: 

    STOP_1      1 stop bit
    STOP_1_5    1.5 stop bits
    STOP_2      2 stop bits

Note:
This function is subject to the following restrictions:
2 stop bits cannot be used with 5 data bits.
1.5 stop bits cannot be used with 6 or more data bits.
POSIX does not support 1.5 stop bits.

Implements QextSerialBase.

00636                                                           {
00637     LOCK_MUTEX();
00638     if (Settings.StopBits!=stopBits) {
00639         if ((Settings.DataBits==DATA_5 && stopBits==STOP_2) ||
00640             (stopBits==STOP_1_5 && Settings.DataBits!=DATA_5)) {
00641         }
00642         else {
00643             Settings.StopBits=stopBits;
00644         }
00645     }
00646     if (isOpen()) {
00647         switch (stopBits) {
00648 
00649             /*one stop bit*/
00650             case STOP_1:
00651                 Win_CommConfig.dcb.StopBits=ONESTOPBIT;
00652                 SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00653                 break;
00654 
00655             /*1.5 stop bits*/
00656             case STOP_1_5:
00657                 TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: 1.5 stop bit operation is not supported by POSIX.");
00658                 if (Settings.DataBits!=DATA_5) {
00659                     TTY_WARNING("Win_QextSerialPort: 1.5 stop bits can only be used with 5 data bits");
00660                 }
00661                 else {
00662                     Win_CommConfig.dcb.StopBits=ONE5STOPBITS;
00663                     SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00664                 }
00665                 break;
00666 
00667             /*two stop bits*/
00668             case STOP_2:
00669                 if (Settings.DataBits==DATA_5) {
00670                     TTY_WARNING("Win_QextSerialPort: 2 stop bits cannot be used with 5 data bits");
00671                 }
00672                 else {
00673                     Win_CommConfig.dcb.StopBits=TWOSTOPBITS;
00674                     SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));
00675                 }
00676                 break;
00677         }
00678     }
00679     UNLOCK_MUTEX();
00680 }

void Win_QextSerialPort::setTimeout ( ulong  sec,
ulong  millisec 
) [virtual]

Sets the read and write timeouts for the port to sec seconds and millisec milliseconds.

Implements QextSerialBase.

01005                                                              {
01006     LOCK_MUTEX();
01007     Settings.Timeout_Sec=sec;
01008     Settings.Timeout_Millisec=millisec;
01009     if(isOpen()) {
01010         Win_CommTimeouts.ReadIntervalTimeout = sec*1000+millisec;
01011         Win_CommTimeouts.ReadTotalTimeoutMultiplier = sec*1000+millisec;
01012         Win_CommTimeouts.ReadTotalTimeoutConstant = 0;
01013         Win_CommTimeouts.WriteTotalTimeoutMultiplier = sec*1000+millisec;
01014         Win_CommTimeouts.WriteTotalTimeoutConstant = 0;
01015         SetCommTimeouts(Win_Handle, &Win_CommTimeouts);
01016     }
01017     UNLOCK_MUTEX();
01018 }

qint64 Win_QextSerialPort::size (  )  const [virtual]

This function will return the number of bytes waiting in the receive queue of the serial port. It is included primarily to provide a complete QIODevice interface, and will not record errors in the lastErr member (because it is const). This function is also not thread-safe - in multithreading situations, use Win_QextSerialPort::bytesAvailable() instead.

Implements QextSerialBase.

00272                                       {
00273     int availBytes;
00274     COMSTAT Win_ComStat;
00275     DWORD Win_ErrorMask=0;
00276     ClearCommError(Win_Handle, &Win_ErrorMask, &Win_ComStat);
00277     availBytes = Win_ComStat.cbInQue;
00278     return (qint64)availBytes;
00279 }

StopBitsType QextSerialBase::stopBits (  )  const [virtual, inherited]

Returns the number of stop bits used by the port. For a list of possible return values, see the definition of the enum StopBitsType. 

00133 {
00134     return Settings.StopBits;
00135 }

void Win_QextSerialPort::terminateCommWait (  )  [protected] 

00996 {
00997     SetCommMask(Win_Handle, 0);
00998 }

void Win_QextSerialPort::translateError ( ulong  error  )  [virtual]

Translates a system-specific error code to a QextSerialPort error code. Used internally.

Implements QextSerialBase.

00310                                                    {
00311     if (error&CE_BREAK) {
00312         lastErr=E_BREAK_CONDITION;
00313     }
00314     else if (error&CE_FRAME) {
00315         lastErr=E_FRAMING_ERROR;
00316     }
00317     else if (error&CE_IOE) {
00318         lastErr=E_IO_ERROR;
00319     }
00320     else if (error&CE_MODE) {
00321         lastErr=E_INVALID_FD;
00322     }
00323     else if (error&CE_OVERRUN) {
00324         lastErr=E_BUFFER_OVERRUN;
00325     }
00326     else if (error&CE_RXPARITY) {
00327         lastErr=E_RECEIVE_PARITY_ERROR;
00328     }
00329     else if (error&CE_RXOVER) {
00330         lastErr=E_RECEIVE_OVERFLOW;
00331     }
00332     else if (error&CE_TXFULL) {
00333         lastErr=E_TRANSMIT_OVERFLOW;
00334     }
00335 }

void Win_QextSerialPort::ungetChar ( char  c  )  [virtual]

This function is included to implement the full QIODevice interface, and currently has no purpose within this class. This function is meaningless on an unbuffered device and currently only prints a warning message to that effect.

Implements QextSerialBase.

00430                                          {
00431 
00432     /*meaningless on unbuffered sequential device - return error and print a warning*/
00433     TTY_WARNING("Win_QextSerialPort: ungetChar() called on an unbuffered sequential device - operation is meaningless");
00434 }

bool Win_QextSerialPort::waitForReadyRead ( int  msecs  )  [virtual]

Todo:
implement.

Reimplemented from QIODevice.

00948 {
00949     //@todo implement
00950     return false;
00951 }

qint64 Win_QextSerialPort::writeData ( const char *  data,
qint64  maxSize 
) [protected, virtual]

Writes a block of data to the serial port. This function will write len bytes from the buffer pointed to by data to the serial port. Return value is the number of bytes actually written, or -1 on error.

Warning:
before calling this function ensure that serial port associated with this class is currently open (use isOpen() function to check if port is open).

Implements QextSerialBase.

00394 {
00395     DWORD retVal;
00396     
00397     LOCK_MUTEX();
00398 
00399     retVal = 0;
00400     if (queryMode() == QextSerialBase::EventDriven) {
00401         bytesToWriteLock->lockForWrite();
00402         _bytesToWrite += maxSize;
00403         bytesToWriteLock->unlock();
00404         overlapWrite.Internal = 0;
00405         overlapWrite.InternalHigh = 0;
00406         overlapWrite.Offset = 0;
00407         overlapWrite.OffsetHigh = 0;
00408         overlapWrite.hEvent = CreateEvent(NULL, true, false, NULL);
00409         if (!WriteFile(Win_Handle, (void*)data, (DWORD)maxSize, & retVal, & overlapWrite)) {
00410             lastErr = E_WRITE_FAILED;
00411             retVal = (DWORD)-1;
00412         } else
00413             retVal = maxSize;
00414     } else if (!WriteFile(Win_Handle, (void*)data, (DWORD)maxSize, & retVal, NULL)) {
00415         lastErr = E_WRITE_FAILED;
00416         retVal = (DWORD)-1;
00417     }
00418     
00419     UNLOCK_MUTEX();
00420 
00421     return (qint64)retVal;
00422 }

Friends And Related Function Documentation

friend class Win_QextSerialThread [friend]

Member Data Documentation

qint64 Win_QextSerialPort::_bytesToWrite [protected]

Todo:
maybe move to QextSerialBase (and implement in POSIX).

QextSerialBase::QueryMode QextSerialBase::_queryMode [protected, inherited]

QReadWriteLock* Win_QextSerialPort::bytesToWriteLock [protected]

Todo:
maybe move to QextSerialBase.

ulong QextSerialBase::lastErr [protected, inherited]

QMutex* QextSerialBase::mutex [protected, inherited]

OVERLAPPED Win_QextSerialPort::overlap [protected]

Win_QextSerialThread* Win_QextSerialPort::overlapThread [protected]

Todo:
maybe move to QextSerialBase (and implement in POSIX).

OVERLAPPED Win_QextSerialPort::overlapWrite [protected]

QString QextSerialBase::port [protected, inherited]

PortSettings QextSerialBase::Settings [protected, inherited]

HANDLE Win_QextSerialPort::threadStartEvent [protected]

HANDLE Win_QextSerialPort::threadTerminateEvent [protected]

COMMCONFIG Win_QextSerialPort::Win_CommConfig [protected]

COMMTIMEOUTS Win_QextSerialPort::Win_CommTimeouts [protected]

HANDLE Win_QextSerialPort::Win_Handle [protected]

The documentation for this class was generated from the following files:
Generated on Wed Sep 5 19:31:22 2007 for QextSerialPort by  doxygen 1.4.7