Esempi in C++ (Cpp) per _Thread_Scheduler_acquire_critical

Esempio n. 1

File: schedulersmp.c Progetto: gedare/rtems

void _Scheduler_Request_ask_for_help( Thread_Control *the_thread )
{
  ISR_lock_Context lock_context;

  _Thread_Scheduler_acquire_critical( the_thread, &lock_context );

  if ( _Chain_Is_node_off_chain( &the_thread->Scheduler.Help_node ) ) {
    Per_CPU_Control *cpu;

    cpu = _Thread_Get_CPU( the_thread );
    _Per_CPU_Acquire( cpu );

    _Chain_Append_unprotected(
      &cpu->Threads_in_need_for_help,
      &the_thread->Scheduler.Help_node
    );

    _Per_CPU_Release( cpu );

    _Thread_Dispatch_request( _Per_CPU_Get(), cpu );
  }

  _Thread_Scheduler_release_critical( the_thread, &lock_context );
}

Esempio n. 2

void _Thread_Scheduler_process_requests( Thread_Control *the_thread )
{
  ISR_lock_Context  lock_context;
  Scheduler_Node   *scheduler_node;

  _Thread_Scheduler_acquire_critical( the_thread, &lock_context );

  scheduler_node = the_thread->Scheduler.requests;

  if ( scheduler_node != NULL ) {
    Scheduler_Node *next;
    Scheduler_Node *remove;

    the_thread->Scheduler.requests = NULL;
    remove = NULL;

    do {
      Scheduler_Node_request request;

      request = scheduler_node->Thread.request;
      scheduler_node->Thread.request = SCHEDULER_NODE_REQUEST_NOT_PENDING;

      next = scheduler_node->Thread.next_request;
#if defined(RTEMS_DEBUG)
      scheduler_node->Thread.next_request = NULL;
#endif

      if ( request == SCHEDULER_NODE_REQUEST_ADD ) {
        ++the_thread->Scheduler.helping_nodes;
        _Chain_Append_unprotected(
          &the_thread->Scheduler.Scheduler_nodes,
          &scheduler_node->Thread.Scheduler_node.Chain
        );
      } else if ( request == SCHEDULER_NODE_REQUEST_REMOVE ) {
        --the_thread->Scheduler.helping_nodes;
        _Chain_Extract_unprotected(
          &scheduler_node->Thread.Scheduler_node.Chain
        );
        scheduler_node->Thread.Scheduler_node.next = remove;
        remove = scheduler_node;
      } else {
        _Assert( request == SCHEDULER_NODE_REQUEST_NOTHING );
      }

      scheduler_node = next;
    } while ( scheduler_node != NULL );

    _Thread_Scheduler_release_critical( the_thread, &lock_context );

    scheduler_node = remove;

    while ( scheduler_node != NULL ) {
      const Scheduler_Control *scheduler;
      ISR_lock_Context         lock_context;

      next = scheduler_node->Thread.Scheduler_node.next;
#if defined(RTEMS_DEBUG)
      scheduler_node->Thread.Scheduler_node.next = NULL;
#endif

      scheduler = _Scheduler_Node_get_scheduler( scheduler_node );

      _Scheduler_Acquire_critical( scheduler, &lock_context );
      ( *scheduler->Operations.withdraw_node )(
        scheduler,
        the_thread,
        scheduler_node,
        THREAD_SCHEDULER_READY
      );
      _Scheduler_Release_critical( scheduler, &lock_context );

      scheduler_node = next;
    }
  } else {
    _Thread_Scheduler_release_critical( the_thread, &lock_context );
  }
}