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Re: how to cast away 'volatile'?
Andrew Haley <aph@redhat.com> writes:
> Ian Lance Taylor writes:
> >
> > All objects shared between threads need to protected by a mutex, or by
> > some other type of memory barrier.
>
> It's an interesting contention -- that in GNU/Linux userspace there
> are essentially no legitimate uses for volatile. Hmmmm...
There is one legitimate use: the C standard blesses the specific case
of "volatile sig_atomic_t". A signal handler can reliably access a
variable of that type.
I don't think there is any other reason to use volatile in userspace.
It simply does not mean what it seems to mean.
Ian