[Bug libstdc++/24704] [3.4/4.0/4.1 Regression] __gnu_cxx::__exchange_and_add is out of line and called even for single threaded applications using std::string

[pcarlini at suse dot de]

------- Comment #6 from pcarlini at suse dot de  2005-11-07 17:07 -------
(In reply to comment #3)
> I've now verified that even when the entire compiler is compiled with
> --enable-threads=single, the resulting libstdc++ does the full 'lock; xadd'
> thing in __exchange_and_add,

This is well known, if you only cared to ask (sorry ;) If you look at the
sources it's clear that nothing about threads changes the choice of the
atomicity.h. I agree however, that it's a very good idea to have that 
configuration option influencing also the atomicity things.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24704