Re: [avr-gcc-list] "Volatile"

[E. Weddington]

Jeff Epler wrote:

> On Sun, Apr 17, 2005 at 03:27:37PM +0200, David Brown wrote:
>  
>
> > If your flag is declared as "volatile unsigned char flag", then
> > operations such as "flag = 0" and "flag = 1" are atomic.
> >    
>
> But is that a requirement of the standard, or simply because
> 1-byte-wide stores are atomic on the AVR architecture?  I believe it's
> the latter.
>
>  
Agreed, IMHO it's the latter.