tests/test-hdr/misc/cxx11_convert_memory_order.h

   1 //$$CDS-header$$
   2
   3 // This header should be included AFTER <cds/cxx11_atomic.h> if needed
   4
   5 namespace misc {
   6
   7     static inline atomics::memory_order convert_to_store_order( atomics::memory_order order )
   8     {
   9         switch ( order ) {
  10             case atomics::memory_order_acquire:
  11             case atomics::memory_order_consume:
  12                 return atomics::memory_order_relaxed;
  13             case atomics::memory_order_acq_rel:
  14                 return atomics::memory_order_release;
  15             default:
  16                 return order;
  17         }
  18     }
  19
  20     static inline atomics::memory_order convert_to_load_order( atomics::memory_order order )
  21     {
  22         switch ( order ) {
  23             case atomics::memory_order_release:
  24                 return atomics::memory_order_relaxed;
  25             case atomics::memory_order_acq_rel:
  26                 return atomics::memory_order_acquire;
  27             default:
  28                 return order;
  29         }
  30     }
  31
  32 #if CDS_COMPILER == CDS_COMPILER_INTEL
  33     static inline atomics::memory_order convert_to_exchange_order( atomics::memory_order order )
  34     {
  35         return order == atomics::memory_order_consume ? atomics::memory_order_relaxed : order;
  36     }
  37 #else
  38     static inline atomics::memory_order convert_to_exchange_order( atomics::memory_order order )
  39     {
  40         return order;
  41     }
  42 #endif
  43
  44     template <typename T, bool Volatile>
  45     struct add_volatile;
  46
  47     template <typename T>
  48     struct add_volatile<T, false>
  49     {
  50         typedef T   type;
  51     };
  52
  53     template <typename T>
  54     struct add_volatile<T, true>
  55     {
  56         typedef T volatile   type;
  57     };
  58
  59 } // namespace misc