K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2013-08-18T08:18:49.844897Z
K 7
svn:log
V 312
MFC r239960:

  Properly enable Clang-style atomics when available.

  In addition to testing against cxx_atomic, we must check c_atomic. The
  former is only set when building C++ code. Also use __has_extension
  instead of __has_feature. This allows us to use the atomics outside of
  C11.

PR:	threads/170073

END