sgpemv2/src/backend/pyloader/python_policy_manager.cc

// src/backend/python_policy_manager.cc - 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

#include "python_policy_manager.hh"

using namespace sgpem;


//static object
PythonPolicyManager* PythonPolicyManager::_instance = NULL;

PythonPolicyManager::PythonPolicyManager()
  : _initialized(false)
{
}

PythonPolicyManager&
PythonPolicyManager::get_instance()
{
	if(!_instance)
	  _instance = new PythonPolicyManager();
	return *_instance;
}

Policy&
PythonPolicyManager::get_policy()
{
	// FIXME : assumes that _python_policy is always != NULL!
	return *_python_policy;
}

void
PythonPolicyManager::init()
{
  if(_initialized)
    Py_Finalize();
  
  Py_Initialize();
  _initialized = true;
  
  // The following line is ugly, but necessary if we use 
  // non-standard installation directories. Theoretically,
  // it should be up to the user to set correct 
  // environment variables. 
  // FIXME: find better way to achieve this.
  
  PyRun_SimpleString("import sys\n"
		     "sys.path[:0] = [ '" MODDIR "', '" PYCDIR "' ]\n");
  
}