APIs: POSIX versus Classic

[Chris Johns]

Joel Sherrill wrote:
> On 08/05/2013 02:43 AM, Sebastian Huber wrote:
>> Hello,
>>
>> the only reason why the POSIX API is optional is that you can save
>> some code
>> and data space in applications that don't need it. It helps also to
>> reduce the
>> code size to be reviewed.
> But underneath they are both instances of SuperCore Thread with
> different attributes set. There is some extra data to track the POSIX
> API features like signal sets, etc. and the minimum code added is
> mostly initialization.

We need to add keys and a condition variable to the classic API because 
we need these for SMP. This means the differences between the 2 APIs is 
closing all the time.

We should aim for a zero cost approach where ever possible.

Chris