Memory barriers in userspace? (Linux, x86-64)

Question

It is easy to set memory barriers on the kernel side: the macros mb, wmb, rmb, etc. are always in place thanks to the Linux kernel headers.

How to accomplish this on th

Answer 1

The include/arch/qatomic_*.h headers of a recent Qt distribution include (LGPL) code for a lot of architectures and all kinds of memory barriers (acquire, release, both).