C++ (Cpp) rtems_io_obtain_major_number Beispiele

Beispiel #1

Datei: ioregisterdriver.c Projekt: 0871087123/rtems

rtems_status_code rtems_io_register_driver(
  rtems_device_major_number         major,
  const rtems_driver_address_table *driver_table,
  rtems_device_major_number        *registered_major
)
{
  rtems_device_major_number major_limit = _IO_Number_of_drivers;

  if ( rtems_interrupt_is_in_progress() )
    return RTEMS_CALLED_FROM_ISR;

  if ( registered_major == NULL )
    return RTEMS_INVALID_ADDRESS;

  /* Set it to an invalid value */
  *registered_major = major_limit;

  if ( driver_table == NULL )
    return RTEMS_INVALID_ADDRESS;

  if ( rtems_io_is_empty_table( driver_table ) )
    return RTEMS_INVALID_ADDRESS;

  if ( major >= major_limit )
    return RTEMS_INVALID_NUMBER;

  _Thread_Disable_dispatch();

  if ( major == 0 ) {
    rtems_status_code sc = rtems_io_obtain_major_number( registered_major );

    if ( sc != RTEMS_SUCCESSFUL ) {
      _Thread_Enable_dispatch();
      return sc;
    }
    major = *registered_major;
  } else {
    rtems_driver_address_table *const table = _IO_Driver_address_table + major;

    if ( !rtems_io_is_empty_table( table ) ) {
      _Thread_Enable_dispatch();
      return RTEMS_RESOURCE_IN_USE;
    }

    *registered_major = major;
  }

  _IO_Driver_address_table [major] = *driver_table;

  _Thread_Enable_dispatch();

  return rtems_io_initialize( major, 0, NULL );
}

Beispiel #2

Datei: ioregisterdriver.c Projekt: Avanznow/rtems

rtems_status_code rtems_io_register_driver(
  rtems_device_major_number         major,
  const rtems_driver_address_table *driver_table,
  rtems_device_major_number        *registered_major
)
{
  rtems_device_major_number major_limit = _IO_Number_of_drivers;

  if ( rtems_interrupt_is_in_progress() )
    return RTEMS_CALLED_FROM_ISR;

  if ( registered_major == NULL )
    return RTEMS_INVALID_ADDRESS;

  /* Set it to an invalid value */
  *registered_major = major_limit;

  if ( driver_table == NULL )
    return RTEMS_INVALID_ADDRESS;

  if ( rtems_io_is_empty_table( driver_table ) )
    return RTEMS_INVALID_ADDRESS;

  if ( major >= major_limit )
    return RTEMS_INVALID_NUMBER;

  _Thread_Disable_dispatch();

  if ( major == 0 ) {
    rtems_status_code sc = rtems_io_obtain_major_number( registered_major );

    if ( sc != RTEMS_SUCCESSFUL ) {
      _Thread_Enable_dispatch();
      return sc;
    }
    major = *registered_major;
  } else {
    rtems_driver_address_table *const table = _IO_Driver_address_table + major;

    if ( !rtems_io_is_empty_table( table ) ) {
      _Thread_Enable_dispatch();
      return RTEMS_RESOURCE_IN_USE;
    }

    *registered_major = major;
  }

  _IO_Driver_address_table [major] = *driver_table;

  _Thread_Enable_dispatch();

  if ( _IO_All_drivers_initialized ) {
    /* Other drivers have already been initialized, we initialize
     * the driver directly.
     */
    return rtems_io_initialize( major, 0, NULL );
  } else {
    /* The driver will be initialized together with all other drivers
     * in a later stage by _IO_Initialize_all_drivers().
     */
    return RTEMS_SUCCESSFUL;
  }
}