Re: getting thread-ID from another thread
On May 30, 1:39 pm, bernd <bernd.schuste...@googlemail.com> wrote:
A transmit thread and a receive thread for each com port is a good plan=
..
Is this always a good plan independent how many com ports I`ve
installed? What`s about the performance (using only one processor)?
I mean in my case there`s only one transmit thread (sending some
message coming via ethernet to the com port) at the same time
possible, because the ethernet stream is serial. But it is always
possible to get some data at different com ports at the same time.
I`m creating the ui-thread with AfxBeginThread.
COM ports are slow. Seems better to me to be able to transmit
simultaneously on more than one of them concurrently. For anything up
to maybe 32 ports or so the impact of one thread per output port
should be rather miniscule at COM port speeds. But this is a minor
issue, and if you prefer doing all the writes in one thread I don't
see any problem with that.
Another question: how is it possible to get the com-port number if I
receive some data? I`m using the whole function from Mr. Newcomer
(http://www.flounder.com/serial.htm)?Each tx ethernet packets has an
information from which com port the data was received.
m_serialWriteThread->parms = new CSerialPort(m_hComm, AfxGetMainWnd(),
shutdown);
With HANDLE port = this->parms->hCom; I only get the handle
best regards
The COM read thread uses PostMessage to pass received data to the main
thread. You can pass the COM port number as part of that message:
CString* s = new CString(....);
PostMessage(UWM_DATA_READ, (WPARAM)s, (LPARAM)port_number);
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