On Sun, Feb 3, 2013 at 11:47 AM, David Brown <david.br...@hesbynett.no> wrote:
>
> Anyway, the simplest memory barrier in gcc is :
>
> asm volatile("" ::: "memory");
That is a compilation level memory barrier, but it clearly does
nothing at the machine level.
To get a machine level (and compilation level) memory barrier using
current GCC, use
__atomic_thread_fence (__ATOMIC_SEQ_CST);
Ian
