interprocess/doc/code/doc_anonymous_semaphore_shared_data.hpp

   #include <boost/interprocess/sync/interprocess_semaphore.hpp>

   struct shared_memory_buffer
   {
      enum { NumItems = 10 };

      shared_memory_buffer()
         : mutex(1), nempty(NumItems), nstored(0)
      {}

      //Semaphores to protect and synchronize access
      boost::interprocess::interprocess_semaphore
         mutex, nempty, nstored;

      //Items to fill
      int items[NumItems];
   };