TaskScheduler.cpp

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/*
Copyright 2007, 2008, 2009, 2010, 2011 Instituto de Sistemas e Robotica, Instituto Superior Tecnico

This file is part of MeRMaID.

MeRMaID is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

MeRMaID is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with MeRMaID.  If not, see <http://www.gnu.org/licenses/>.
*/



/**
 * @Filename TaskScheduler.cpp
 * @Description TaskScheduler implementation
 * @Status Work in Progress
 * @Version $Id: TaskScheduler.cpp 1 2011-03-04 18:13:18Z jreis $
 * @Maintainer nmsra (nmsra@mega.ist.utl.pt)
 */


#include "config.h"

#include "TaskScheduler.hpp"
#include "TaskSchedulerPolicy.hpp"
#include <Exception.hpp>

using namespace mermaid::support::activeobject;
using mermaid::support::errorhandling::Exception;

TaskScheduler::TaskScheduler()
{
  policy_ = &earliestFirst;
  sq_ = shared_ptr<SchedulingQueue> (new SchedulingQueue (policy_));
}; // TaskScheduler

void TaskScheduler::addTask (shared_ptr<Task> t)
{
  sq_->push (t);
}; // addTask(Task * t)

shared_ptr<Task> TaskScheduler::getNextTask()
{
  shared_ptr<Task> t;
  if (sq_->empty() == false) {
    t = sq_->top();
    sq_->pop();
  }
  
  return t;
  
}; // getNextTask()

shared_ptr<Task> TaskScheduler::peakNextTask()
{
  shared_ptr<Task> t;
  if (sq_->empty() == false) {
    t = sq_->top();
  }
  
  return t;
  
}; // peakNextTask()

/*void TaskScheduler::setSchedulerPolicy(TaskSchedulerPolicy p)
{
    policy_ = p;
    //! @TODO really do something useful here
}; // setSchedluerPolicy*/