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   From: marc.glisse@gmail.com   
      
   Agents Marlow  wrote:   
      
   > On Oct 9, 1:27 pm, Marc  wrote:   
   >> Hello,   
   >>   
   >> I am trying to make our reference counting implementation thread-safe   
   >> (for a very basic definition of thread-safe), which essentially means   
   >> making the counter atomic.   
   >   
   > I would take a look at the implementation of the atomic counter in the   
   > Poco Foundation class library.   
      
   Thanks for the pointer.   
   They only implement it lock-free for windows and mac, and the   
   interesting part is that on mac they use the atomic operations without   
   a memory barrier (and since mac used to run on PPC, it makes a   
   difference).  They perform a load by simply reading the variable (an   
   int) which doesn't offer any protection against compiler   
   optimizations, I am trying to think of the worst that could happen   
   because of that...   
      
      
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