r191042 - in /trunk/libstdc++-v3: ChangeLog lib...

[bkoz@gcc.gnu.org]

Author: bkoz
Date: Thu Sep  6 20:31:08 2012
New Revision: 191042

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191042
Log:
2012-09-06  Thiago Macieira  <thiago.macieira@intel.com>

	PR libstdc++/54172
        * libsupc++/guard.cc (__cxa_guard_acquire): Exit the loop earlier if
        we detect that another thread has had success. Don't compare_exchange
        from a finished state back to a waiting state. Comment.


Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/libsupc++/guard.cc