SALOME documentation central

src/Container/Container_init_python.hxx

00001 //  Copyright (C) 2007-2008  CEA/DEN, EDF R&D, OPEN CASCADE
00002 //
00003 //  Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
00004 //  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
00005 //
00006 //  This library is free software; you can redistribute it and/or
00007 //  modify it under the terms of the GNU Lesser General Public
00008 //  License as published by the Free Software Foundation; either
00009 //  version 2.1 of the License.
00010 //
00011 //  This library is distributed in the hope that it will be useful,
00012 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 //  Lesser General Public License for more details.
00015 //
00016 //  You should have received a copy of the GNU Lesser General Public
00017 //  License along with this library; if not, write to the Free Software
00018 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
00019 //
00020 //  See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
00021 //
00022 //  SALOME Container : implementation of container and engine for Kernel
00023 //  File   : Container_init_python.hxx
00024 //  Author : Paul RASCLE, EDF
00025 //  Module : KERNEL
00026 //  $Header$
00027 //
00028 #ifndef _CONTAINER_INIT_PYTHON_HXX_
00029 #define _CONTAINER_INIT_PYTHON_HXX_
00030 
00031 #include "SALOME_Container.hxx"
00032 #include <SALOMEconfig.h>
00033 
00034 #include <pthread.h>  // must be before Python.h !
00035 #include <Python.h>
00036 
00037 
00038 // next two MACRO must be used together only once inside a block
00039 // -------------------------------------------------------------
00040 // protect a sequence of Python calls:
00041 // - Python lock must be acquired for these calls
00042 // - new Python thread state allows multi thread use of the sequence:
00043 //    - Python may release the lock within the sequence, so multiple
00044 //      thread execution of the sequence may occur.
00045 //    - For that case, each sequence call must use a specific Python
00046 //      thread state.
00047 //    - There is no need of C Lock protection of the sequence.
00048 
00049 
00050 #define Py_ACQUIRE_NEW_THREAD \
00051   PyEval_AcquireLock(); \
00052   PyThreadState *myTstate = PyThreadState_New(KERNEL_PYTHON::_interp); \
00053   PyThreadState_Swap(myTstate);
00054 
00055 #define Py_RELEASE_NEW_THREAD \
00056   PyEval_ReleaseThread(myTstate); \
00057   PyThreadState_Delete(myTstate);
00058 
00059 struct CONTAINER_EXPORT KERNEL_PYTHON
00060 {
00061 #ifdef WIN32
00062   static PyThreadState *get_gtstate() { return KERNEL_PYTHON::_gtstate; }
00063   static PyObject *getsalome_shared_modules_module() { return KERNEL_PYTHON::salome_shared_modules_module; }
00064   static PyInterpreterState *get_interp() { return KERNEL_PYTHON::_interp; }
00065 #endif
00066   static PyThreadState *_gtstate;
00067   static PyObject *salome_shared_modules_module;
00068   static PyInterpreterState *_interp;
00069 
00070   static void init_python(int argc, char **argv);
00071 
00072 };
00073 
00074 #endif