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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/job_manager.h
* @brief A simple scheduler for jobs.
*/
#include "signaller.h"
#include <boost/thread/mutex.hpp>
#include <boost/thread.hpp>
#include <boost/signals2.hpp>
#include <list>
class Job;
extern void wait_for_jobs ();
/** @class JobManager
* @brief A simple scheduler for jobs.
*/
class JobManager : public Signaller, public boost::noncopyable
{
public:
boost::shared_ptr<Job> add (boost::shared_ptr<Job>);
std::list<boost::shared_ptr<Job> > get () const;
bool work_to_do () const;
bool errors () const;
boost::signals2::signal<void (boost::weak_ptr<Job>)> JobAdded;
boost::signals2::signal<void (bool)> ActiveJobsChanged;
static JobManager* instance ();
static void drop ();
private:
/* This function is part of the test suite */
friend void ::wait_for_jobs ();
JobManager ();
~JobManager ();
void scheduler ();
void start ();
mutable boost::mutex _mutex;
std::list<boost::shared_ptr<Job> > _jobs;
bool _terminate;
bool _last_active_jobs;
boost::thread* _scheduler;
static JobManager* _instance;
};
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