/*
 * Worker.hh
 *
 *  Created on: 20 janv. 2013
 *      Author: taz
 */

#ifndef WORKER_HH_
#define WORKER_HH_

#include <boost/thread/thread.hpp>
#include <boost/thread/future.hpp>

#include "CThreadDeque.hh"

namespace AMDA {
	namespace Helpers {

		namespace base {
			struct Task {
				virtual ~Task() {}
				virtual void operator()() = 0;
			};
		}

		template <typename Result>
		class Task : public base::Task {
		public:
			typedef boost::function< Result ()> Func;
			Task(Func func) : _func(func) {}
			void operator()() {try {
				_promise.set_value(_func());
			} catch(...) {
				_promise.set_exception(boost::current_exception());
			}
			}

			boost::unique_future<Result> getFuture() { return _promise.get_future(); }

		private:
			Func _func;
			boost::promise<Result> _promise;
		};

class Worker {
public:
	Worker();
	virtual ~Worker();

	void active() {
		if(!_thread.joinable()) {
		_running = true;
		_thread = boost::thread(boost::bind(&Worker::taskLoop,this));
		}
	}

protected:
	void taskLoop() {
		//Execute Task
		base::Task* task = NULL;
		do {
		  if ( (task = _taskList.pop_timedwait( 60, task))) {
				(*task)();
				delete task;
				task = NULL;
		  }
		} while( _running);

  }
protected:

	CThreadDeque<base::Task*> _taskList;
	bool                _running;
	boost::thread       _thread;
};

} /* namespace Helpers */
} /* namespace AMDA */
#endif /* WORKER_HH_ */