CSerial::EError CSerial::GetError (void)
{
// Reset error state
m_lLastError = ERROR_SUCCESS;
// Check if the device is open
if (m_hFile == 0)
{
// Set the internal error code
m_lLastError = ERROR_INVALID_HANDLE;
// Issue an error and quit
_RPTF0(_CRT_WARN,"CSerial::GetError - Device is not opened\n");
return EErrorUnknown;
}
// Obtain COM status
DWORD dwErrors = 0;
if (!::ClearCommError(m_hFile,&dwErrors,0))
{
// Set the internal error code
m_lLastError = ::GetLastError();
// Issue an error and quit
_RPTF0(_CRT_WARN,"CSerial::GetError - Unable to obtain COM status\n");
return EErrorUnknown;
}
// Return the error
return EError(dwErrors);
}
DWORD CSerialEx::ThreadProc (void)
{
// Use overlapped structure
LPOVERLAPPED lpOverlapped = 0;
// Keep looping
do
{
#ifndef SERIAL_NO_OVERLAPPED
// Reset the event handle
::ResetEvent(m_hevtOverlappedWorkerThread);
// Initialize the overlapped structure
OVERLAPPED ovInternal = {0};
ovInternal.hEvent = m_hevtOverlappedWorkerThread;
// Start the WaitEvent (use our own overlapped structure)
if (WaitEvent(&ovInternal) != ERROR_SUCCESS)
return m_lLastError;
// Wait for the overlapped operation to complete
if (::WaitForSingleObject(m_hevtOverlappedWorkerThread,INFINITE) != WAIT_OBJECT_0)
{
// Set the internal error code
m_lLastError = ::GetLastError();
// Issue an error and quit
_RPTF0(_CRT_WARN,"CSerialEx::ThreadProc - Unable to wait until COM event has arrived\n");
return m_lLastError;
}
#else
// Start the WaitEvent (don't need to specify an overlapped structure)
if (WaitEvent() != ERROR_SUCCESS)
return m_lLastError;
#endif
// Wait until one of the events happens
if (!m_fStopping)
{
// Determine the event
EEvent eEvent = GetEventType();
// Obtain the error status during this event
DWORD dwErrors = 0;
if (!::ClearCommError(m_hFile,&dwErrors,0))
{
// Set the internal error code
m_lLastError = ::GetLastError();
// Issue an error and quit
_RPTF0(_CRT_WARN, "CSerialEx::ThreadProc - Unable to obtain COM status\n");
}
// Convert the error
EError eError = EError(dwErrors);
// There was a COMM event, which needs handling. We'll call the
// event handler. We can receive a "zero" event, when the
// mask or event character has been set. We won't pass this
// down to the window.
if (eEvent)
OnEvent(eEvent,eError);
}
}
while (!m_fStopping);
// Bye bye
return 0;
}
