[Boost-bugs] [Boost C++ Libraries] #3750: atomic_cas32 not working for Sun Solaris 10

Subject: [Boost-bugs] [Boost C++ Libraries] #3750: atomic_cas32 not working for Sun Solaris 10
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-12-11 06:37:29

#3750: atomic_cas32 not working for Sun Solaris 10
-------------------------------------------------------------+--------------
 Reporter:  SAURABH PANDEY <saurabh.pandey@…>                |       Owner:  igaztanaga  
     Type:  Bugs                                             |      Status:  new         
Milestone:  Boost 1.42.0                                     |   Component:  interprocess
  Version:  Boost 1.40.0                                     |    Severity:  Problem     
 Keywords:  atomic_cas32 on Sun solaris 10                   |  
-------------------------------------------------------------+--------------
 #include <iostream>
 #include "boost/interprocess/detail/atomic.hpp"

 boost::uint32_t m_contextId     = 0;
 long rtIncrContextId()
 {
         boost::uint32_t contextId = -1;
         boost::uint32_t oldValue          = -1;
         do
         {
                 oldValue                =       m_contextId;
                 contextId       =       m_contextId + 1;
                 if(boost::interprocess::detail::atomic_cas32((volatile
 boost::uint32_t *)&m_contextId,contextId,oldValue) == oldValue)
                         break;
         }while (true);
         return contextId;
 }

 int main()
 {
         std::cout << " \n Value of m_contextId " <<     m_contextId;

         rtIncrContextId();

         std::cout << " \n Value of m_contextId " <<     m_contextId <<
 std::endl;
 }
 '''
 The above program is not working on sun solaris 10 using sparc.
 g++ version is 4.4.2 and because of this sun sparc specific atomic
 operation are not being used . Instead following function is used'''
 ''#elif defined(__GNUC__) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 )

 --------------------------------
 ------------------------------

 inline boost::uint32_t atomic_cas32
    (volatile boost::uint32_t *mem, boost::uint32_t with, boost::uint32_t
 cmp)
 {  return __sync_val_compare_and_swap(const_cast<boost::uint32_t *>(mem),
 with, cmp);   }''

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3750>
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