Esempi in C++ (Cpp) per _Atomic_Compare_exchange_ulong

Esempio n. 1

File: smpmulticastaction.c Progetto: gedare/rtems

static void
_SMP_Multicasts_try_process( void )
{
  unsigned long message;
  Per_CPU_Control *cpu_self;
  ISR_Level isr_level;

  _ISR_Local_disable( isr_level );

  cpu_self = _Per_CPU_Get();

  message = _Atomic_Load_ulong( &cpu_self->message, ATOMIC_ORDER_RELAXED );

  if ( message & SMP_MESSAGE_MULTICAST_ACTION ) {
    if ( _Atomic_Compare_exchange_ulong( &cpu_self->message, &message,
        message & ~SMP_MESSAGE_MULTICAST_ACTION, ATOMIC_ORDER_RELAXED,
        ATOMIC_ORDER_RELAXED ) ) {
      _SMP_Multicast_actions_process();
    }
  }

  _ISR_Local_enable( isr_level );
}

Esempio n. 2

File: init.c Progetto: Avanznow/rtems

static void test_simple_atomic_compare_exchange_body(test_context *ctx)
{
  unsigned int ei;
  unsigned int vi;
  uintptr_t ep;
  uintptr_t vp;
  unsigned long el;
  unsigned long vl;
  bool success;

  puts("=== atomic simple compare exchange test case ===");

  _Atomic_Store_uint(&ctx->uint_atomic, 1, ATOMIC_ORDER_RELAXED);
  ei = 2;
  success = _Atomic_Compare_exchange_uint(
    &ctx->uint_atomic,
    &ei,
    3,
    ATOMIC_ORDER_RELAXED,
    ATOMIC_ORDER_RELAXED
  );
  rtems_test_assert(!success);
  rtems_test_assert(ei == 1);
  success = _Atomic_Compare_exchange_uint(
    &ctx->uint_atomic,
    &ei,
    3,
    ATOMIC_ORDER_RELAXED,
    ATOMIC_ORDER_RELAXED
  );
  rtems_test_assert(success);
  vi = _Atomic_Load_uint(&ctx->uint_atomic, ATOMIC_ORDER_RELAXED);
  rtems_test_assert(vi == 3);

  _Atomic_Store_uintptr(&ctx->uintptr_atomic, 111, ATOMIC_ORDER_RELAXED);
  ep = 211;
  success = _Atomic_Compare_exchange_uintptr(
    &ctx->uintptr_atomic,
    &ep,
    311,
    ATOMIC_ORDER_RELAXED,
    ATOMIC_ORDER_RELAXED
  );
  rtems_test_assert(!success);
  rtems_test_assert(ep == 111);
  success = _Atomic_Compare_exchange_uintptr(
    &ctx->uintptr_atomic,
    &ep,
    311,
    ATOMIC_ORDER_RELAXED,
    ATOMIC_ORDER_RELAXED
  );
  rtems_test_assert(success);
  vp = _Atomic_Load_uintptr(&ctx->uintptr_atomic, ATOMIC_ORDER_RELAXED);
  rtems_test_assert(vp == 311);

  _Atomic_Store_ulong(&ctx->ulong_atomic, 10, ATOMIC_ORDER_RELAXED);
  el = 11;
  success = _Atomic_Compare_exchange_ulong(
    &ctx->ulong_atomic,
    &el,
    12,
    ATOMIC_ORDER_RELAXED,
    ATOMIC_ORDER_RELAXED
  );
  rtems_test_assert(!success);
  rtems_test_assert(el == 10);
  success = _Atomic_Compare_exchange_ulong(
    &ctx->ulong_atomic,
    &el,
    12,
    ATOMIC_ORDER_RELAXED,
    ATOMIC_ORDER_RELAXED
  );
  rtems_test_assert(success);
  vl = _Atomic_Load_ulong(&ctx->ulong_atomic, ATOMIC_ORDER_RELAXED);
  rtems_test_assert(vl == 12);
}