pd.if.org Git - liblfds/blob - liblfds/liblfds7.1.0/test_and_benchmark/libbenchmark/inc/libbenchmark/libbenchmark_porting_abstraction_layer_lock_gcc_spinlock_atomic.h

   1 /****************************************************************************/
   2 #if( defined __GNUC__ && LIBLFDS_GCC_VERSION >= 473 )
   3
   4   /***** defines *****/
   5   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC 1
   6
   7   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_UNINITIALIZED  0
   8   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_AVAILABLE      1
   9   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_UNAVAILABLE    2
  10
  11   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_CREATE( pal_lock_gcc_spinlock_atomic_state )  \
  12   {                                                                                               \
  13     (pal_lock_gcc_spinlock_atomic_state) = LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_AVAILABLE;   \
  14     LFDS710_MISC_BARRIER_STORE;                                                                   \
  15     lfds710_misc_force_store();                                                                   \
  16   }
  17
  18   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_DESTROY( pal_lock_gcc_spinlock_atomic_state )  \
  19   {                                                                                                \
  20     (pal_lock_gcc_spinlock_atomic_state) = LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_UNAVAILABLE;  \
  21     LFDS710_MISC_BARRIER_STORE;                                                                    \
  22     lfds710_misc_force_store();                                                                    \
  23   }
  24
  25   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_GET( pal_lock_gcc_spinlock_atomic_state )                                                                                                                                                                                                             \
  26   {                                                                                                                                                                                                                                                                                                       \
  27     lfds710_pal_uint_t expected = (lfds710_pal_uint_t) LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_AVAILABLE;                                                                                                                                                                                               \
  28     while( 0 == __atomic_compare_exchange_n(&(pal_lock_gcc_spinlock_atomic_state), &expected, (lfds710_pal_uint_t) LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_UNAVAILABLE, 1, __ATOMIC_RELAXED, __ATOMIC_RELAXED) )  expected = (lfds710_pal_uint_t) LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_AVAILABLE;  \
  29   }
  30
  31   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_RELEASE( pal_lock_gcc_spinlock_atomic_state )  __atomic_exchange_n( &(pal_lock_gcc_spinlock_atomic_state), (void *) LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_AVAILABLE, __ATOMIC_RELAXED )
  32
  33   /***** typedefs *****/
  34   typedef lfds710_pal_uint_t pal_lock_gcc_spinlock_atomic_state;
  35
  36 #endif
  37
  38
  39
  40
  41
  42 /****************************************************************************/
  43 #if( !defined LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC )
  44
  45   /***** defines *****/
  46   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC 0
  47
  48   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_CREATE( pal_lock_gcc_spinlock_atomic_state )
  49   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_DESTROY( pal_lock_gcc_spinlock_atomic_state )
  50   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_GET( pal_lock_gcc_spinlock_atomic_state )
  51   #define LIBBENCHMARK_PAL_LOCK_GCC_SPINLOCK_ATOMIC_RELEASE( pal_lock_gcc_spinlock_atomic_state )
  52
  53   /***** typedefs *****/
  54   typedef void * pal_lock_gcc_spinlock_atomic_state;
  55
  56 #endif
  57