// src/backend/pyloader/python_policy.hh - Copyright 2005, 2006, University
//               of Padova, dept. of Pure and Applied
//               Mathematics
//
// This file is part of SGPEMv2.
//
// This 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.
//
// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

#ifndef PYTHON_POLICY_HH
#define PYTHON_POLICY_HH 1

#include "config.h"

#include <Python.h>
#include <glibmm/ustring.h>

#include <iostream>

#include "policy.hh"
#include "user_interrupt_exception.hh"

namespace sgpem
{
  class PythonPolicy;
  class PythonPolicyManager;
  class UserInterruptException;

	/** \brief A specialization of abstract class Policy

		This class represents a policy written in Python. Its methods interact with Python interpreter.
		See the documentation of class Policy for more detailed informations.
	*/
  class SG_DLLEXPORT PythonPolicy : public Policy
  {
  public:
    PythonPolicy(const char* name);
    virtual ~PythonPolicy();

	/**
		Calls the method \c async_configure
	*/
    void			configure() throw(UserInterruptException);

    /**
    	Calls the method \c async_sort_queue
    */
    void 			sort_queue(Scheduler::event) const throw(UserInterruptException);

    /**
    	\returns A textual description of this policy.
    */
    Glib::ustring 	        get_description() const;

    /**
    	\returns \c TRUE if the policy is preemptive.
    	\returns \c FALSE if the policy is not preemptive.
    */
    bool 			is_pre_emptive() const throw(UserInterruptException);

    /**
    	\returns The integer value of its time-slice.
    */
    int              get_time_slice() const throw(UserInterruptException);

  private:
    PythonPolicy(const PythonPolicy&);
    PythonPolicy& operator=(const PythonPolicy&);

    void wait_unlock() const throw(UserInterruptException);

    PyObject* _upolicy_dict;
    PyObject* _adapter;

    Glib::ustring _name;
  };

}

#endif