impatomic: add atomic_{thread,signal}_fence() definitions
authorBrian Norris <banorris@uci.edu>
Fri, 30 Nov 2012 23:05:44 +0000 (15:05 -0800)
committerBrian Norris <banorris@uci.edu>
Fri, 30 Nov 2012 23:18:26 +0000 (15:18 -0800)
The impatomic.h header is outdated. Additional information from the ISO
papers N2633, N2731, and N2752 have limited the "fence()" support to
just these two functions.


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