This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug c++/13684] local static object variable constructed once but ctors and dtors called multiple times on same memory when called in multiple threads
- From: "gianni at mariani dot ws" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Jul 2004 02:16:38 -0000
- Subject: [Bug c++/13684] local static object variable constructed once but ctors and dtors called multiple times on same memory when called in multiple threads
- References: <20040114172507.13684.evijaykumar@yahoo.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From gianni at mariani dot ws 2004-07-15 02:16 -------
Andrew wrote:
> Basically allocation of static variables in functions are not done thread
> safe, I do not think there is any way that GCC will be able to do this
> efficiently, I would not use local static variables if you are
> going to use threads.
Actually, it can be quite efficient on some platforms. Also, since this is a
one-time thing, efficiency is not that big a deal.
This posting from Zack Weinberg indicates pretty much how it could be done in a
way that more-or-less works as efficiently as it does without thread safety.
http://gcc.gnu.org/ml/gcc/2002-08/msg00284.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13684