How to make non-blocking calls in libmodbus?

I was needed almost the same thing. So, last few days I have changing whole library.
I split it to 4 libraries.
3 of them can be used separately from each other:
   comm_serial.c - Library for working with serial ports in linux
   comm_tcp.c - Library for working with TCP/IP protocol
   modbus.c - Library, that only generates outgoing and analyses incoming messages (have to be OS-independent)

Last file is modbus_comm.c. It used to abstract user from communication libraries, as it were done in previous version.

For now the library has some bugs, so I do not release it while debugging.

I will send You current version.

picoworm, the Modbus library is under LGPL so you need to publish your code to everyone. Could you provide a link, please?

Feel free to propose some patches to the current version to add async behaviour.

Stéphane Raimbault wrote, On 07/30/2009 08:50 PM:
> Question #75753 on libmodbus changed:
> https://answers.launchpad.net/libmodbus/+question/75753
>
> Stéphane Raimbault proposed the following answer:
> picoworm, the Modbus library is under LGPL so you need to publish your
> code to everyone. Could you provide a link, please?
>

IANAL, but my understanding of the LGPL is that picoworm would need to publish his/her code ONLY to
those s/he gave a binary of it to, and as long as what picoworm sent to Abid was the source code,
then picoworm has done an appropriate thing.

if picoworm only sent a binary, then picoworm probably needs to remember the extension of an offer
to send the source code in accordance with the LGPL to Abid.

Just trying to say, your answer _felt_ more like a an over demand than _I_ felt strictly necessary.

Of course nothing, except trying to let picoworm get his/her code in better shape first, would then
legally stop Abid from releasing when Abid got. :)

> Feel free to propose some patches to the current version to add async
> behaviour.

My reading was that picoworm would probably publish wider when picoworm's code was a little more
stable. But I suspect if you were given access, the stabilization process might be sped along
because of your interest. :)

--
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane)
Harnessing the Power of Technology for the Warfighter

Thank you, Todd.
Of course, the licence is tied to the distribution of the software.

I am really interested in these changes to libmodbus. Are there any news?

Look my code at - http://sites.google.com/site/picoworminfo/files

I had some problems when pushing new bzr branch, so it will be on my web-site for some-time

Some description is in header files. Tested with tcp (single and multiclient) and rtu

Used with Xenomai reatime subsystem.