C++ (Qt)
/*
    License...
*/
 
#ifndef SERIALPORT_P_H
#define SERIALPORT_P_H
 
#include "serialport.h"
 
#if defined (Q_OS_WIN)
#  include <qt_windows.h>
#else
#  include <termios.h>
//#  include "../unix/ttylocker.h"
#endif
 
 
class SerialPortPrivate
{
public:
    SerialPortPrivate();
    virtual ~SerialPortPrivate();
 
    void setNativePort(const QString &port);
    QString nativePort() const;
 
    bool nativeOpen(QIODevice::OpenMode mode);
    void nativeClose();
 
    bool nativeSetRate(qint32 rate, SerialPort::Directions dir);
    qint32 nativeRate(SerialPort::Directions dir) const;
 
    bool nativeSetDataBits(SerialPort::DataBits dataBits);
    SerialPort::DataBits nativeDataBits() const;
 
    bool nativeSetParity(SerialPort::Parity parity);
    SerialPort::Parity nativeParity() const;
 
    bool nativeSetStopBits(SerialPort::StopBits stopBits);
    SerialPort::StopBits nativeStopBits() const;
 
    bool nativeSetFlowControl(SerialPort::FlowControl flow);
    SerialPort::FlowControl nativeFlowControl() const;
 
    void nativeSetDataInterval(int usecs);
    int nativeDataInterval() const;
 
    void nativeSetReadTimeout(int msecs);
    int nativeReadTimeout() const;
 
    bool nativeDtr() const;
    bool nativeRts() const;
 
    SerialPort::Lines nativeLines() const;
 
    bool nativeFlush();
    bool nativeReset();
 
    void nativeSetDataErrorPolicy(SerialPort::DataErrorPolicy policy);
    SerialPort::DataErrorPolicy nativeDataErrorPolicy() const;
 
    SerialPort::PortError nativeError() const;
    void nativeUunsetError();
 
    qint64 nativeBytesAvailable() const;
 
    qint64 nativeRead(char *data, qint64 len);
    qint64 nativeWrite(const char *data, qint64 len);
 
    int nativeSelect(int timeout, bool checkRead, bool checkWrite,
                     bool *selectForRead, bool *selectForWrite);
 
private:
    //General (for any OS) private parameters
    QString mPort;
    qint32 mInRate;
    qint32 mOutRate;
    SerialPort::DataBits mDataBits;
    SerialPort::Parity mParity;
    SerialPort::StopBits mStopBits;
    SerialPort::FlowControl mFlow;
    int mDataInterval;
    int mReadTimeout;
    SerialPort::DataErrorPolicy mPolicy;
    SerialPort::PortError mError;
 
    //General (for any OS) private methods
    void initVariables();
 
    void detectDefaultRate();
    void detectDefaultDataBits();
    void detectDefaultParity();
    void detectDefaultStopBits();
    void detectDefaultFlowControl();
    void detectDefaultCurrentSettings();
 
    bool prepareOtherOptions();
 
    bool saveOldSettings();
    bool restoreOldSettings();
 
    //OS specific parameters and methods
#ifdef Q_OS_WIN
 
    enum CommTimeouts {
        ReadIntervalTimeout, ReadTotalTimeoutMultiplier,
        ReadTotalTimeoutConstant, WriteTotalTimeoutMultiplier,
        WriteTotalTimeoutConstant
    };
 
    DCB mDCB, mOldDCB;
    COMMTIMEOUTS mCommTimeouts, mOldCommTimeouts;
    OVERLAPPED mOvRead;
    OVERLAPPED mOvWrite;
    OVERLAPPED mOvSelect;
 
    bool createEvents(bool rx, bool tx);
    bool closeEvents() const;
    void recalcTotalReadTimeoutConstant();
    void prepareCommTimeouts(CommTimeouts cto, DWORD msecs);
    bool updateDcb();
    bool updateCommTimeouts();
#else
    struct termios mTermios;
    struct termios mOldTermios;
    void prepareTimeouts(int msecs);
    bool updateTermious();
    bool setStandartRate(AbstractSerial::BaudRateDirection, speed_t rate);
    bool setCustomRate(qint32 rate);
#endif
 
};
 
#endif // SERIALPORT_P_H