Barrier.h

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#ifndef ossimBarrier_HEADER
#define ossimBarrier_HEADER 1
#include <ossim/base/ossimConstants.h>
#include <mutex>
#include <condition_variable>
#include <atomic>

namespace ossim{

   class OSSIM_DLL Barrier 
   {
   public:
      Barrier(ossim_int32 n);

      ~Barrier();

      void block();

      void reset();

      void reset(ossim_int32 maxCount);

      ossim_int32 getMaxCount()const;
      ossim_int32 getBlockedCount()const;
   protected:
      ossim_int32              m_maxCount;
      ossim_int32              m_blockedCount;
      std::atomic<ossim_int32> m_waitCount;
      mutable std::mutex       m_mutex;
      std::condition_variable  m_conditionalBlock;

      std::condition_variable m_conditionalWait;
   };
}

#endif