[boost] missing __volatile__ tags in sp_counted_base_gcc_xxx.hpp

From: Howard Hinnant (howard.hinnant_at_[hidden])
Date: 2006-03-13 14:17:40

Hello,

I've been investigating some failures on Mac OS X, ppc concerning  
shared_ptr.  One of the things that has struck me is that in boost/ 
detail/sp_counted_base_gcc_ppc.hpp, the __asm__ block in  
atomic_decrement is decorated with __volatile__, but the __asm__  
blocks in atomic_increment and atomic_conditional_increment are not.   
The failure I'm seeing disappears when the __volatile__ attribute is  
added in the two missing places.  Would this be a proper fix to boost/ 
detail/sp_counted_base_gcc_ppc.hpp?  Should boost/detail/ 
sp_counted_base_gcc_x86.hpp be treated similarly?

Thanks,
Howard