Re: [Boost-bugs] [Boost C++ Libraries] #5847: sp_counted_base_pt.hpp: appears to suffer a race conditions

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5847: sp_counted_base_pt.hpp: appears to suffer a race conditions
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-08-31 03:03:03

#5847: sp_counted_base_pt.hpp: appears to suffer a race conditions
--------------------------------------------------+-------------------------
  Reporter:  Jeffrey Walton <noloader@…>          |       Owner:  pdimov   
      Type:  Bugs                                 |      Status:  closed   
 Milestone:  To Be Determined                     |   Component:  smart_ptr
   Version:  Boost 1.47.0                         |    Severity:  Problem  
Resolution:  invalid                              |    Keywords:           
--------------------------------------------------+-------------------------
Changes (by steven_watanabe):

  * status:  new => closed
  * resolution:  => invalid

Comment:

 In release, new_use_count is a local variable, so
 access to it doesn't need to be protected.  If it
 is 0, then we're destroying the last shared_ptr.
 Thus, no other thread can modify use_count.

 You're comments on the other functions are not
 applicable, because you've left out the
 pthread_mutex_[un]lock calls.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5847#comment:1>
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