C++ (Cpp) PTW32_INTERLOCKED_COMPARE_EXCHANGE_PTR Examples

Example #1

File: ptw32_MCS_lock.c Project: erdincay/vcxsrv-linux2windows

INLINE 
#endif /* PTW32_BUILD_INLINED */
void 
ptw32_mcs_node_transfer (ptw32_mcs_local_node_t * new_node, ptw32_mcs_local_node_t * old_node)
{
  new_node->lock = old_node->lock;
  new_node->nextFlag = 0; /* Not needed - used only in initial Acquire */
  new_node->readyFlag = 0; /* Not needed - we were waiting on this */
  new_node->next = 0;

  if ((ptw32_mcs_local_node_t *)PTW32_INTERLOCKED_COMPARE_EXCHANGE_PTR((PTW32_INTERLOCKED_PVOID_PTR)new_node->lock,
                                                                       (PTW32_INTERLOCKED_PVOID)new_node,
                                                                       (PTW32_INTERLOCKED_PVOID)old_node)
       != old_node)
    {
      /*
       * A successor has queued after us, so wait for them to link to us
       */
      while (old_node->next == 0)
        {
          sched_yield();
        }
      new_node->next = old_node->next;
    }
}

Example #2

File: ptw32_MCS_lock.c Project: erdincay/vcxsrv-linux2windows

INLINE 
#endif /* PTW32_BUILD_INLINED */
void 
ptw32_mcs_lock_release (ptw32_mcs_local_node_t * node)
{
  ptw32_mcs_lock_t *lock = node->lock;
  ptw32_mcs_local_node_t *next =
    (ptw32_mcs_local_node_t *)
      PTW32_INTERLOCKED_EXCHANGE_ADD_SIZE((PTW32_INTERLOCKED_SIZEPTR)&node->next, (PTW32_INTERLOCKED_SIZE)0); /* MBR fence */

  if (0 == next)
    {
      /* no known successor */

      if (node == (ptw32_mcs_local_node_t *)
	  PTW32_INTERLOCKED_COMPARE_EXCHANGE_PTR((PTW32_INTERLOCKED_PVOID_PTR)lock,
						 (PTW32_INTERLOCKED_PVOID)0,
						 (PTW32_INTERLOCKED_PVOID)node))
	{
	  /* no successor, lock is free now */
	  return;
	}
  
      /* wait for successor */
      ptw32_mcs_flag_wait(&node->nextFlag);
      next = (ptw32_mcs_local_node_t *)
	PTW32_INTERLOCKED_EXCHANGE_ADD_SIZE((PTW32_INTERLOCKED_SIZEPTR)&node->next, (PTW32_INTERLOCKED_SIZE)0); /* MBR fence */
    }

  /* pass the lock */
  ptw32_mcs_flag_set(&next->readyFlag);
}

Example #3

File: ptw32_MCS_lock.c Project: qtekfun/htcDesire820Kernel

INLINE 
#endif 
void 
ptw32_mcs_lock_release (ptw32_mcs_local_node_t * node)
{
  ptw32_mcs_lock_t *lock = node->lock;
  ptw32_mcs_local_node_t *next =
    (ptw32_mcs_local_node_t *)
      PTW32_INTERLOCKED_EXCHANGE_ADD_SIZE((PTW32_INTERLOCKED_SIZEPTR)&node->next, (PTW32_INTERLOCKED_SIZE)0); 

  if (0 == next)
    {
      

      if (node == (ptw32_mcs_local_node_t *)
	  PTW32_INTERLOCKED_COMPARE_EXCHANGE_PTR((PTW32_INTERLOCKED_PVOID_PTR)lock,
						 (PTW32_INTERLOCKED_PVOID)0,
						 (PTW32_INTERLOCKED_PVOID)node))
	{
	  
	  return;
	}
  
      
      ptw32_mcs_flag_wait(&node->nextFlag);
      next = (ptw32_mcs_local_node_t *)
	PTW32_INTERLOCKED_EXCHANGE_ADD_SIZE((PTW32_INTERLOCKED_SIZEPTR)&node->next, (PTW32_INTERLOCKED_SIZE)0); 
    }

  
  ptw32_mcs_flag_set(&next->readyFlag);
}

Example #4

File: ptw32_MCS_lock.c Project: erdincay/vcxsrv-linux2windows

INLINE 
#endif /* PTW32_BUILD_INLINED */
int 
ptw32_mcs_lock_try_acquire (ptw32_mcs_lock_t * lock, ptw32_mcs_local_node_t * node)
{
  node->lock = lock;
  node->nextFlag = 0;
  node->readyFlag = 0;
  node->next = 0; /* initially, no successor */

  return ((PTW32_INTERLOCKED_PVOID)PTW32_INTERLOCKED_COMPARE_EXCHANGE_PTR((PTW32_INTERLOCKED_PVOID_PTR)lock,
                                                        (PTW32_INTERLOCKED_PVOID)node,
                                                        (PTW32_INTERLOCKED_PVOID)0)
                                 == (PTW32_INTERLOCKED_PVOID)0) ? 0 : EBUSY;
}

Example #5

File: ptw32_MCS_lock.c Project: qtekfun/htcDesire820Kernel

INLINE 
#endif 
int 
ptw32_mcs_lock_try_acquire (ptw32_mcs_lock_t * lock, ptw32_mcs_local_node_t * node)
{
  node->lock = lock;
  node->nextFlag = 0;
  node->readyFlag = 0;
  node->next = 0; 

  return ((PTW32_INTERLOCKED_PVOID)PTW32_INTERLOCKED_COMPARE_EXCHANGE_PTR((PTW32_INTERLOCKED_PVOID_PTR)lock,
                                                        (PTW32_INTERLOCKED_PVOID)node,
                                                        (PTW32_INTERLOCKED_PVOID)0)
                                 == (PTW32_INTERLOCKED_PVOID)0) ? 0 : EBUSY;
}

Example #6

File: ptw32_MCS_lock.c Project: qtekfun/htcDesire820Kernel

INLINE 
#endif 
void 
ptw32_mcs_node_transfer (ptw32_mcs_local_node_t * new_node, ptw32_mcs_local_node_t * old_node)
{
  new_node->lock = old_node->lock;
  new_node->nextFlag = 0; 
  new_node->readyFlag = 0; 
  new_node->next = 0;

  if ((ptw32_mcs_local_node_t *)PTW32_INTERLOCKED_COMPARE_EXCHANGE_PTR((PTW32_INTERLOCKED_PVOID_PTR)new_node->lock,
                                                                       (PTW32_INTERLOCKED_PVOID)new_node,
                                                                       (PTW32_INTERLOCKED_PVOID)old_node)
       != old_node)
    {
      while (old_node->next == 0)
        {
          sched_yield();
        }
      new_node->next = old_node->next;
    }
}