Re: [Boost-bugs] [Boost C++ Libraries] #5859: win32 shared_mutex constructor leaks on exceptions

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5859: win32 shared_mutex constructor leaks on exceptions
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-12-04 15:38:11

#5859: win32 shared_mutex constructor leaks on exceptions
--------------------------------+-------------------------------------------
  Reporter:  phrosty@…          |       Owner:  viboes      
      Type:  Bugs               |      Status:  assigned    
 Milestone:  To Be Determined   |   Component:  thread      
   Version:  Boost 1.47.0       |    Severity:  Problem     
Resolution:                     |    Keywords:  shared_mutex
--------------------------------+-------------------------------------------

Comment (by viboes):

 In order to avoid a chained try-catch a no_throw
 create_anonymous_semaphore_nothrow function can be used like in


 {{{
             if (!semaphores[exclusive_sem])
             {
 detail::win32::release_semaphore(semaphores[unlock_sem],LONG_MAX);
               boost::throw_exception(thread_resource_error());
             }
 upgrade_sem=detail::win32::create_anonymous_semaphore_nothrow(0,LONG_MAX);
             if (!upgrade_sem)
             {
 detail::win32::release_semaphore(semaphores[unlock_sem],LONG_MAX);
 detail::win32::release_semaphore(semaphores[exclusive_sem],LONG_MAX);
               boost::throw_exception(thread_resource_error());
             }
 }}}

 While this is not too elegant it solves the issue. A RAI handle would be
 also appreciated.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5859#comment:2>
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