[ECOS] Atomic types

[Nick Garnett]

manu shetty <shetty_m@yahoo.com> writes:

> So, if I define the variable as atomic then the
> following operation happens uninterruptible
>         
>         cyg_halatomic   i;
>            i=0;
>            i+=1;
>            i-=1;  

No. As the documentation says, all it guarantees is that reads or
writes are performed atomically, usually by a single instruction,
rather than a sequence of loads or stores. So "i=0" will be atomic,
but "i+=1" will comprise a read and a write and will not be atomic. 


-- 
Nick Garnett                                 eCos Kernel Architect
http://www.ecoscentric.com            The eCos and RedBoot experts


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