/*! \brief Wait for data to arrive or a timeout to occur.
\details The function waits until \c maxLength data is available or until a timeout occurs.
The function returns success if data is available or XsResultValue::TIMEOUT if a
timeout occurred. A timeout value of 0 indicates that the default timeout stored
in the class should be used.
\param maxLength The maximum number of bytes to read before returning
\param data The buffer to put the read data in.
\returns XRV_OK if \a maxLength bytes were read, XRV_TIMEOUT if less was read, XRV_TIMEOUTNODATA if nothing was read
*/
XsResultValue SerialInterface::waitForData(XsSize maxLength, XsByteArray& data)
{
data.clear();
data.reserve(maxLength);
//char *data = (char *)&_data[0];
JLTRACE(gJournal, "timeout=" << m_timeout << ", maxLength=" << maxLength);
uint32_t timeout = m_timeout;
uint32_t eTime = XsTime_getTimeOfDay(NULL, NULL) + timeout;
// uint32_t newLength = 0;
while ((data.size() < maxLength) && (XsTime_getTimeOfDay(NULL, NULL) <= eTime))
{
XsByteArray raw;
if (readData(maxLength - data.size(), raw) != XRV_OK)
return m_lastResult;
data.append(raw);
}
JLTRACE(gJournal, "Read " << data.size() << " of " << maxLength << " bytes");
if (data.size() < maxLength)
return (m_lastResult = XRV_TIMEOUT);
else
return (m_lastResult = XRV_OK);
}
/*! \brief Returns the current time in ms since the epoch (Jan 1st 1970)
\param now Pointer to %XsTimeStamp container for the returned value, may be 0
\returns The current time in ms since the epoch (Jan 1st 1970) as a 64-bit integer
*/
int64_t XsTime_timeStampNow(XsTimeStamp* now)
{
XsTimeStamp tmp;
time_t s;
if (now == 0)
now = &tmp;
now->m_msTime = (long long) XsTime_getTimeOfDay(NULL,&s);
now->m_msTime = (now->m_msTime % 1000) + (((long long)s)*1000);
return now->m_msTime;
}
