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Writing test port, incoming_message [message #1775844]

Tue, 07 November 2017 07:57

Naum Spaseski

Messages: 81
Registered: February 2016
Location: Sophia Antipolis

Member

Hello everyone,

I was searching this in the docs, but I didn't find anything: What is the recommended way to listen for a message in the test port, by using a separate thread/process or directly inside the port? Is it ok to start for listening in the user_map() - but then, how to manage the timeouts (when to restart the listening after timeout)?

And, what events are the write and read events in the test port?

Thanks in advance,

Best regards,
Naum

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Re: Writing test port, incoming_message [message #1775846 is a reply to message #1775844]

Tue, 07 November 2017 08:08

Gábor Szalai

Messages: 133
Registered: December 2015

Senior Member

Hi,

The Titan is designed to 1 thread per component, so no separate threads or process is needed.

There are 3 event handler functions in every test port, (or one which combines the 3) which are called when the socket either
- is readable: there are data available to read from the socket
- is writable: data can be written to the socket
- socket error: there is an error indication on the socket.

The meaning of the are the same as like the select()/poll() system call.

When you create the socket, you should register the socket for the appropriate event handler. Usually only the readable event is registered.

For a simple example please check the UDP test port.

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Re: Writing test port, incoming_message [message #1775847 is a reply to message #1775846]

Tue, 07 November 2017 08:23

Naum Spaseski

Messages: 81
Registered: February 2016
Location: Sophia Antipolis

Member

Hello Gabor,

Thanks for the explanation.

[ content deleted ]

Best regards,
Naum

[Updated on: Tue, 07 November 2017 08:25]

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Re: Writing test port, incoming_message [message #1775886 is a reply to message #1775847]

Tue, 07 November 2017 15:58

Naum Spaseski

Messages: 81
Registered: February 2016
Location: Sophia Antipolis

Member

Sorry to bother,

One quick question: is it OK to use Handler_add_Fd() instead of Install_handler()? Which one is the recommended?

Best regards,
Naum

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