skaller <[EMAIL PROTECTED]> writes: > On Fri, 2007-10-26 at 08:27 -0700, Ian Lance Taylor wrote: > > skaller <[EMAIL PROTECTED]> writes: > > > > > > I understand that's the common meaning .. but the semantics > > > aren't specified for ISO C/C++. > > > > Sure they are. In the C99 standard look at the definition of sequence > > points (5.1.2.3) and the definition of volatile (6.7.3). > > 6.7.3 volatile bullet is non-normative. As pointed > out in previous post: volatile accesses are observable. > What 6.7.3 says is not a definition, but something which can > be deduced from their status as observables. > > The key point which makes this waffle is the bit that says > 'what constitutes an access is implementation defined'.
OK, fair enough. Of course, the gcc implementation does define it in the documentation. Ian