- Add missing files

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@338 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/pyloader/python_policy_manager.cc

@@ -0,0 +1,71 @@
+// 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() //private constructor. The parameter is discarded
+{
+}
+
+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()
+{
+	static bool initialized = false;
+
+	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");
+	
+}
+
+