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

   1 /****************************************************************************/
   2 #if( defined _MSC_VER && _MSC_VER >= 1400 )
   3
   4   /* TRD : MSVC
   5
   6            _MSC_VER  indicates Microsoft C compiler
   7                        - _InterlockedCompareExchangePointer requires 8.0 (1400)
   8   */
   9
  10   /***** defines *****/
  11   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK 1
  12
  13   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_UNINITIALIZED  0
  14   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_AVAILABLE      1
  15   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_UNAVAILABLE    2
  16
  17   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_CREATE( pal_lock_msvc_spinlock_state )  \
  18   {                                                                                   \
  19     pal_lock_msvc_spinlock_state = LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_AVAILABLE;     \
  20     LFDS710_MISC_BARRIER_STORE;                                                       \
  21     lfds710_misc_force_store();                                                       \
  22   }
  23
  24   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_DESTROY( pal_lock_msvc_spinlock_state )  \
  25   {                                                                                    \
  26     pal_lock_msvc_spinlock_state = LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_UNAVAILABLE;    \
  27     LFDS710_MISC_BARRIER_STORE;                                                        \
  28     lfds710_misc_force_store();                                                        \
  29   }
  30
  31   /* TRD : bloody MS - they have multiple functions for the same thing
  32           I have to use my own abstraction layer *just to get my code working on MS platforms!*
  33   */
  34
  35   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_GET( pal_lock_msvc_spinlock_state )                                                                \
  36   {                                                                                                                                              \
  37     char unsigned                                                                                                                                \
  38       result;                                                                                                                                    \
  39                                                                                                                                                  \
  40     lfds710_pal_uint_t                                                                                                                           \
  41       compare;                                                                                                                                   \
  42                                                                                                                                                  \
  43     do                                                                                                                                           \
  44     {                                                                                                                                            \
  45       compare = LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_AVAILABLE;                                                                                                         \
  46       LFDS710_PAL_ATOMIC_CAS( &(pal_lock_msvc_spinlock_state), &compare, LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_UNAVAILABLE, LFDS710_MISC_CAS_STRENGTH_STRONG, result );  \
  47     }                                                                                                                                            \
  48     while( result == 0 );                                                                                                                        \
  49   }
  50
  51   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_RELEASE( pal_lock_msvc_spinlock_state )  \
  52   {                                                                                    \
  53     LFDS710_PAL_ATOMIC_SET( &(pal_lock_msvc_spinlock_state), LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_AVAILABLE );         \
  54   }
  55
  56   /***** typedefs *****/
  57   typedef lfds710_pal_uint_t pal_lock_msvc_spinlock_state;
  58
  59 #endif
  60
  61
  62
  63
  64
  65 /****************************************************************************/
  66 #if( !defined LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK )
  67
  68   /***** defines *****/
  69   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK 0
  70
  71   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_CREATE( pal_lock_msvc_spinlock_state )
  72   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_DESTROY( pal_lock_msvc_spinlock_state )
  73   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_GET( pal_lock_msvc_spinlock_state )
  74   #define LIBBENCHMARK_PAL_LOCK_MSVC_SPINLOCK_RELEASE( pal_lock_msvc_spinlock_state )
  75
  76   /***** typedefs *****/
  77   typedef void * pal_lock_msvc_spinlock_state;
  78
  79 #endif
  80