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#include "dummycommon.h"

#ifdef Q_OS_WINCE

#include <windows.h>

// WINCE has <time.h> but using clock() gives a link error because

// the function isn't actually implemented.

#else

#include <time.h>

#endif

dummycommon::dummycommon(QSensor *sensor)

    : QSensorBackend(sensor)

    , m_timerid(0)

{

}

void dummycommon::start()

{

    if (m_timerid)

        return;

    int dataRate = sensor()->dataRate();

    if (dataRate == 0) {

        if (sensor()->availableDataRates().count())

            // Use the first available rate when -1 is chosen

            dataRate = sensor()->availableDataRates().first().first;

        else

            dataRate = 1;

    }

    int interval = 1000 / dataRate;

    if (interval)

        m_timerid = startTimer(interval);

}

void dummycommon::stop()

{

    if (m_timerid) {

        killTimer(m_timerid);

        m_timerid = 0;

    }

}

void dummycommon::timerEvent(QTimerEvent * /*event*/)

{

    poll();

}

qtimestamp getTimestamp()

{

#ifdef Q_OS_WINCE

    // This implementation is based on code found here:

    // http://social.msdn.microsoft.com/Forums/en/vssmartdevicesnative/thread/74870c6c-76c5-454c-8533-812cfca585f8

    HANDLE currentThread = GetCurrentThread();

    FILETIME creationTime, exitTime, kernalTime, userTime;

    GetThreadTimes(currentThread, &creationTime, &exitTime, &kernalTime, &userTime);

    ULARGE_INTEGER uli;

    uli.LowPart = userTime.dwLowDateTime;

    uli.HighPart = userTime.dwHighDateTime;

    ULONGLONG systemTimeInMS = uli.QuadPart/10000;

    return static_cast<qtimestamp>(systemTimeInMS);

#else

    return clock();

#endif

}