[Bug c++/54729] __compare_and_swap does not return on all paths

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54729



--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-09-27 
17:34:01 UTC ---

(In reply to comment #0)

> I had wrongly used the __compare_and_swap with a "volatile bool" variable and

> without the _GLIBCXX_DEBUG and _GLIBCXX_PARALLEL being defined.



So don't do that.



If you want a CAS function use the __atomic_compare_exchange builtin, not the

parallel mode's internal implementation details.