POSIX Once Implementation

[Sebastian Huber]

On 03/07/2014 05:19 PM, Joel Sherrill wrote:
> This currently uses a pthread mutex.  That implies when
> I turn it on for all configurations, pthread mutexes will have
> to be enabled.
>
> Would it be correct and acceptable to rewrite this to use
> CPU atomic locks?

No, this doesn't work.  You must block if you own an SMP lock.

We need an internal mutex here, similar to the allocator mutex.

-- 
Sebastian Huber, embedded brains GmbH

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