Subj : Re: Can C++ local static objects be made thread safe?
To   : comp.programming.threads
From : Giancarlo Niccolai
Date : Wed Feb 02 2005 03:53 pm

Joseph Seigh wrote:


>> The reason I think this may work is that the value of x_Name is
>> idempotent and the only thing the lock is doing is to have threads wait
>> for the initialization.
>>
> Missing read memory barrier to ensure reads of data occur
> after read of pointer to data.  Also write memory barrier
> to ensure writes of data occur before write of pointer.
> The lock doesn't solve either of those problems.
> 
> There's a couple of solutions to this but I don't have all the
> urls instantly on hand like Alexander seems to have.
> 

I agree; also, if this crap makes its way into GCC, I will stop using it.

Giancarlo.

.