Re: [gpsd-dev] Updated docs on NTP segment management

[Harlan Stenn]

http://clang.llvm.org/docs/LanguageExtensions.html has some info about
clang and memory barrier intrinsics, but they seem to be for ARM only.

I'd hope that somebody has written a library of these things for
different compilers (including AIX, Solaris, and some other platforms).

I haven't looked in to this stuff much though.

I'm game to have a libntpshm/ tear-off (unless there's a better name for
it) that we could use for all of this, that would be shared between at
least NTP and GPSD.  I know some other folks use this code as well, but
they are not real loud about it.

H