C++ (Cpp) _Addresses_Subtract Examples

Example #1

File: dpmeminternal2external.c Project: FullMentalPanic/RTEMS_NEW_TOOL_CHAIN

rtems_status_code rtems_port_internal_to_external(
  rtems_id   id,
  void      *internal,
  void     **external
)
{
  register Dual_ported_memory_Control *the_port;
  Objects_Locations                    location;
  uint32_t                             ending;

  if ( !external )
    return RTEMS_INVALID_ADDRESS;

  the_port = _Dual_ported_memory_Get( id, &location );
  switch ( location ) {

    case OBJECTS_LOCAL:
      ending = _Addresses_Subtract( internal, the_port->internal_base );
      if ( ending > the_port->length )
        *external = internal;
      else
        *external = _Addresses_Add_offset( the_port->external_base,
                                           ending );
      _Thread_Enable_dispatch();
      return RTEMS_SUCCESSFUL;

#if defined(RTEMS_MULTIPROCESSING)
    case OBJECTS_REMOTE:        /* this error cannot be returned */
#endif
    case OBJECTS_ERROR:
      break;
  }

  return RTEMS_INVALID_ID;
}

Example #2

File: dpmeminternal2external.c Project: AoLaD/rtems

rtems_status_code rtems_port_internal_to_external(
  rtems_id   id,
  void      *internal,
  void     **external
)
{
  Dual_ported_memory_Control *the_port;
  ISR_lock_Context            lock_context;
  uint32_t                    ending;

  if ( external == NULL ) {
    return RTEMS_INVALID_ADDRESS;
  }

  the_port = _Dual_ported_memory_Get( id, &lock_context );

  if ( the_port == NULL ) {
    return RTEMS_INVALID_ID;
  }

  ending = _Addresses_Subtract( internal, the_port->internal_base );

  if ( ending > the_port->length ) {
    *external = internal;
  } else {
    *external = _Addresses_Add_offset( the_port->external_base, ending );
  }

  _ISR_lock_ISR_enable( &lock_context );
  return RTEMS_SUCCESSFUL;
}