Re: [Boost-bugs] [Boost C++ Libraries] #6308: Add sp_counted_base_aix.hpp using AIX atomic operations

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #6308: Add sp_counted_base_aix.hpp using AIX atomic operations
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-12-22 21:07:25

#6308: Add sp_counted_base_aix.hpp using AIX atomic operations
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  Reporter:  aaron.riekenberg@…          |       Owner:  pdimov      
      Type:  Feature Requests            |      Status:  reopened    
 Milestone:  To Be Determined            |   Component:  smart_ptr   
   Version:  Boost 1.48.0                |    Severity:  Optimization
Resolution:                              |    Keywords:              
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Changes (by aaron.riekenberg@…):

  * status:  closed => reopened
  * resolution:  fixed =>

Comment:

 As documented in smart_ptr/detail/atomic_count.hpp, in cases when the
 reference count is decremented to 0 we need a memory barrier before
 destroying the pointed-to object.

 sp_counted_base_aix_memory_barrier.patch adds this using the isync
 instruction.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/6308#comment:3>
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