using cAT Library in a multi core CPU environment

[rretanubun]

Hello,

I noticed that the cat_init() function supports an argument for a mutex.
Is the mutex intended to be used to protect in environments with multiple core CPU?

One of the project I am working on uses the cAT library for unit test and target deployment.

In the unit-test (running on a multi core system) the AT-commands are written to a circular buffer
and the cAT library writes out its responses back to a file in the filesystem that is then compared
against an expected response.

If I run this in a multi CPU core environment, some test fails with responses that does not match
the expected response. However, if I restrict the test to a single core
(e.g. using taskset -c 1 in linux), all the test will pass.

If I am missing something, what are the recommended
practices for using the library in a multi core CPU environment?

Thank you for everyone's time!