/// <summary>
/// Start the I/O thread.
/// </summary>
public void Start()
{
m_IsRunning = true;
try {
if (m_Buffers == null) m_Buffers = new OverlappedIoState(m_ReadBufferSize, m_WriteBufferSize);
// Set the time outs
NativeMethods.COMMTIMEOUTS timeouts = new NativeMethods.COMMTIMEOUTS();
// We read only the data that is buffered
#if PL2303_WORKAROUNDS
// Timeout if data hasn't arrived in 10ms, or if the read takes longer than 100ms in total
timeouts.ReadIntervalTimeout = 10;
timeouts.ReadTotalTimeoutConstant = 100;
timeouts.ReadTotalTimeoutMultiplier = 0;
#else
// Non-asynchronous behaviour
timeouts.ReadIntervalTimeout = -1;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.ReadTotalTimeoutMultiplier = 0;
#endif
// We have no time outs when writing
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 500;
bool result = UnsafeNativeMethods.SetCommTimeouts(m_ComPortHandle, ref timeouts);
if (!result) throw new IOException("Couldn't set CommTimeouts", Marshal.GetLastWin32Error());
m_Thread = new Thread(new ThreadStart(OverlappedIoThread));
m_Thread.Name = "SerialPortStream_" + Name;
m_Thread.IsBackground = true;
m_Thread.Start();
} catch {
m_IsRunning = false;
throw;
}
}
/// <summary>
/// Dispose resources for this object.
/// </summary>
/// <param name="disposing"><b>true</b> if we're disposing from the program, <b>false</b> if
/// disposing from the finaliser.</param>
private void Dispose(bool disposing)
{
if (disposing) {
if (IsRunning) Stop();
if (m_Buffers != null) m_Buffers.Dispose();
m_Buffers = null;
m_StopRunning.Dispose();
m_SerialCommEvent.Dispose();
m_ReadEvent.Dispose();
m_WriteEvent.Dispose();
m_ReadBufferNotFullEvent.Dispose();
m_WriteBufferNotEmptyEvent.Dispose();
m_ReadBufferNotEmptyEvent.Dispose();
m_WriteBufferNotFullEvent.Dispose();
m_ReadBufferEvent.Dispose();
m_TxBufferEmpty.Dispose();
m_WriteClearEvent.Dispose();
m_WriteClearDoneEvent.Dispose();
}
}
