[M3devel] atomics questions

[Tony Hosking]

On 11 Feb 2010, at 07:11, Jay K wrote:

> What if some atomic operations aren't available?
>  
>  
> If none are available, then they can all fallback to one giant lock.
>  

Correct.

>  
> But what if some are and some aren't?



> A lock per type?

Yes.  Definitely.  No unions in M3.

>  
> That fails with like
>  union {
>   short s[2];
>   int i;
> } u;
>  
>  
> and platform has atomic int but not atomic short.

We do have atomic WIDECHARl

>  
>  
>  - Jay
> 

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