Could std::atomic<T> be shared bettween rt thread and nrt thread?

Could std::atomic<T> be shared bettween rt thread and nrt thread?

[孙世龙]

Hi,
     Could std::atomic<T> be shared bettween rt thread and nrt thread?
     Is it cause latency problem?
     Is it cause rt thread to switch to secondary mode?


     Thank you for your attention.
     Look forward to hearing from you.

Re: Could std::atomic<T> be shared bettween rt thread and nrt thread?

[Jan Kiszka]

On 09.05.20 10:28, 孙世龙 via Xenomai wrote:
> Hi,
>       Could std::atomic<T> be shared bettween rt thread and nrt thread?
>       Is it cause latency problem?
>       Is it cause rt thread to switch to secondary mode?
> 

I'm not familiar with their implementation details. As long as they use 
architectural atomic instructions and no syscalls, this is safe.

The problem with runtime libraries - and that also applies to C++ - is 
that you need to know their internals in order to use them safely for 
time-critical code. It's out of scope for the Xenomai project, we only 
provide that best-effort detection mechanism (SIGDEBUG).

Jan

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