Method GetDSR

src/SerialStream.cpp:816–841

    }

    bool
    SerialStream::GetDSR()
    try
    {
        auto my_buffer = dynamic_cast<SerialStreamBuf *>(this->rdbuf()) ;

        // Make sure that we are dealing with a SerialStreamBuf before
        // proceeding. This check also makes sure that we have a non-NULL
        // buffer associated with this stream.
        if (my_buffer != nullptr)
        {
            // Try to get the DSR line state.
            return my_buffer->GetDSR() ;
        }
        // If the dynamic_cast above failed then we either have a NULL
        // streambuf associated with this stream or we have a buffer of
        // class other than SerialStreamBuf. In either case, we have a
        // problem and we should stop all I/O using this stream.
        setstate(badbit) ;
        return false ;
    }
    catch (const std::exception&)
    {
        setstate(std::ios_base::failbit) ;
        throw ;
    }

    int
    SerialStream::GetFileDescriptor()