[Boost-users] How to implementing a conditional wait

Subject: [Boost-users] How to implementing a conditional wait
From: Daniele Barzotti (daniele.barzotti_at_[hidden])
Date: 2009-02-20 05:55:48

Hi,

I have to do a simple task, but I'm quite confused.
I have a class that sends some data on RS232 and wait for a answer.
(What in Windows is WaitForSingleObject)

void ATDispatcher::OnDataReveived()
{
  // Data received from RS232
  serial_port.GetData(&buffer);

  boost::lock_guard<boost::mutex> lock(mut);
  data_ready = true;
  cond.notify_one();

};

void ATDispatcher::AtDispatcher(SerialPort& device) : _device(device)
{
  // Connecting the slot for receiving event
  _device.OnData(boost::bind(&ATDispatcher::OnDataReceived(), &this));

};

int ATDispatcher::SendCommand(std::string cmd,
                              bool waitOK = true,
                              bool decode_answer = true
                              int  cmd_timeout = COMMAND_TIMEOUT)
{

    boost::unique_lock<boost::mutex> lock(mut);
    boost::xtime xt;
    xtime_get(&xt,boost::TIME_UTC);
    xt.sec += cmd_timeout;
    data_ready = false;

    //Send data....

    while(!data_ready)
    {
        cond.timed_wait(lock, xt);
    }
};

Ok, The OnDataReceived is called from the SerialPort thread when the
data is available.
In the SendCommand I have to wait for a timeout or until the answer is
arrived...how can I do it?

Thanks!
Daniele.