rtems_status_code rtems_task_delete(
  rtems_id id
)
{
  register Thread_Control *the_thread;
  Objects_Locations        location;
  Objects_Information     *the_information;

  _RTEMS_Lock_allocator();

  the_thread = _Thread_Get( id, &location );
  switch ( location ) {

    case OBJECTS_LOCAL:
      the_information = _Objects_Get_information_id( the_thread->Object.id );

      #if defined(RTEMS_DEBUG)
	if ( !the_information ) {
	  _Thread_Enable_dispatch();
	  return RTEMS_INVALID_ID;
	  /* This should never happen if _Thread_Get() works right */
	}
      #endif

      #if defined(RTEMS_MULTIPROCESSING)
        if ( the_thread->is_global ) {
          _Objects_MP_Close( &_RTEMS_tasks_Information, the_thread->Object.id );
          _RTEMS_tasks_MP_Send_process_packet(
            RTEMS_TASKS_MP_ANNOUNCE_DELETE,
            the_thread->Object.id,
            0                                /* Not used */
          );
        }
      #endif

      _Thread_Close( the_information, the_thread );

      _RTEMS_tasks_Free( the_thread );

      _RTEMS_Unlock_allocator();
      _Thread_Enable_dispatch();
      return RTEMS_SUCCESSFUL;

#if defined(RTEMS_MULTIPROCESSING)
    case OBJECTS_REMOTE:
      _RTEMS_Unlock_allocator();
      _Thread_Dispatch();
      return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
#endif

    case OBJECTS_ERROR:
      break;
  }

  _RTEMS_Unlock_allocator();
  return RTEMS_INVALID_ID;
}
Exemple #2
0
rtems_status_code rtems_task_create(
  rtems_name           name,
  rtems_task_priority  initial_priority,
  size_t               stack_size,
  rtems_mode           initial_modes,
  rtems_attribute      attribute_set,
  rtems_id            *id
)
{
  Thread_Control          *the_thread;
  bool                     is_fp;
#if defined(RTEMS_MULTIPROCESSING)
  Objects_MP_Control      *the_global_object = NULL;
  bool                     is_global;
#endif
  bool                     status;
  rtems_attribute          the_attribute_set;
  Priority_Control         core_priority;
  RTEMS_API_Control       *api;
  ASR_Information         *asr;


  if ( !id )
   return RTEMS_INVALID_ADDRESS;

  if ( !rtems_is_name_valid( name ) )
    return RTEMS_INVALID_NAME;

  /*
   *  Core Thread Initialize insures we get the minimum amount of
   *  stack space.
   */

  /*
   *  Fix the attribute set to match the attributes which
   *  this processor (1) requires and (2) is able to support.
   *  First add in the required flags for attribute_set
   *  Typically this might include FP if the platform
   *  or application required all tasks to be fp aware.
   *  Then turn off the requested bits which are not supported.
   */

  the_attribute_set = _Attributes_Set( attribute_set, ATTRIBUTES_REQUIRED );
  the_attribute_set =
    _Attributes_Clear( the_attribute_set, ATTRIBUTES_NOT_SUPPORTED );

  if ( _Attributes_Is_floating_point( the_attribute_set ) )
    is_fp = true;
  else
    is_fp = false;

  /*
   *  Validate the RTEMS API priority and convert it to the core priority range.
   */

  if ( !_Attributes_Is_system_task( the_attribute_set ) ) {
    if ( !_RTEMS_tasks_Priority_is_valid( initial_priority ) )
      return RTEMS_INVALID_PRIORITY;
  }

  core_priority = _RTEMS_tasks_Priority_to_Core( initial_priority );

#if defined(RTEMS_MULTIPROCESSING)
  if ( _Attributes_Is_global( the_attribute_set ) ) {

    is_global = true;

    if ( !_System_state_Is_multiprocessing )
      return RTEMS_MP_NOT_CONFIGURED;

  } else
    is_global = false;
#endif

  /*
   *  Make sure system is MP if this task is global
   */

  /*
   *  Allocate the thread control block and -- if the task is global --
   *  allocate a global object control block.
   *
   *  NOTE:  This routine does not use the combined allocate and open
   *         global object routine because this results in a lack of
   *         control over when memory is allocated and can be freed in
   *         the event of an error.
   */

  the_thread = _RTEMS_tasks_Allocate();

  if ( !the_thread ) {
    _Objects_Allocator_unlock();
    return RTEMS_TOO_MANY;
  }

#if defined(RTEMS_MULTIPROCESSING)
  if ( is_global ) {
    the_global_object = _Objects_MP_Allocate_global_object();

    if ( _Objects_MP_Is_null_global_object( the_global_object ) ) {
      _RTEMS_tasks_Free( the_thread );
      _Objects_Allocator_unlock();
      return RTEMS_TOO_MANY;
    }
  }
#endif

  /*
   *  Initialize the core thread for this task.
   */

  status = _Thread_Initialize(
    &_RTEMS_tasks_Information,
    the_thread,
    _Scheduler_Get_by_CPU_index( _SMP_Get_current_processor() ),
    NULL,
    stack_size,
    is_fp,
    core_priority,
    _Modes_Is_preempt(initial_modes)   ? true : false,
    _Modes_Is_timeslice(initial_modes) ?
      THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE :
      THREAD_CPU_BUDGET_ALGORITHM_NONE,
    NULL,        /* no budget algorithm callout */
    _Modes_Get_interrupt_level(initial_modes),
    (Objects_Name) name
  );

  if ( !status ) {
#if defined(RTEMS_MULTIPROCESSING)
    if ( is_global )
      _Objects_MP_Free_global_object( the_global_object );
#endif
    _RTEMS_tasks_Free( the_thread );
    _Objects_Allocator_unlock();
    return RTEMS_UNSATISFIED;
  }

  api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
  asr = &api->Signal;

  asr->is_enabled = _Modes_Is_asr_disabled(initial_modes) ? false : true;

  *id = the_thread->Object.id;

#if defined(RTEMS_MULTIPROCESSING)
  the_thread->is_global = is_global;
  if ( is_global ) {

    _Objects_MP_Open(
      &_RTEMS_tasks_Information.Objects,
      the_global_object,
      name,
      the_thread->Object.id
    );

    _RTEMS_tasks_MP_Send_process_packet(
      RTEMS_TASKS_MP_ANNOUNCE_CREATE,
      the_thread->Object.id,
      name
    );

   }
#endif

  _Objects_Allocator_unlock();
  return RTEMS_SUCCESSFUL;
}