19 Dec
2012
19 Dec
'12
noon
Andrey Semashev wrote: On Wed, Dec 19, 2012 at 3:27 PM, Peter Dimov <lists@pdimov.com> wrote:
Where (file/line) is the mfence that can be removed?
atomic/detail/windows.hpp, line 174.
Comparing it to gcc-x86.hpp, the gcc implementation indeed doesn't have it, so I'm probably right.
It doesn't seem necessary, but it's only used at one place, in atomic_flag::clear. All uses of READ_BARRIER or WRITE_BARRIER seem wrong, though. READ_WRITE_BARRIER is needed in all places where these are used.