PAL12755: EDF: SALOME frozen with Load Script and a Python Module. Additional fix.

src/GEOMGUI/GeometryGUI_Swig.i

@@ -30,6 +30,32 @@
 #include "GeometryGUI_Swig.hxx"
 %}
 
+/*
+  managing C++ exception in the Python API
+*/
+%exception
+{
+  class PyAllowThreadsGuard {
+   public:
+    // Py_BEGIN_ALLOW_THREADS
+    PyAllowThreadsGuard() { _save = PyEval_SaveThread(); }
+    // Py_END_ALLOW_THREADS
+    ~PyAllowThreadsGuard() { PyEval_RestoreThread(_save); }
+   private:
+    PyThreadState *_save;
+  };
+
+  PyAllowThreadsGuard guard;
+
+  try {
+    $action
+  }
+  catch(...) {
+    PyErr_SetString(PyExc_RuntimeError,"Unknown exception caught");
+    return NULL;
+  }
+}
+
 class GEOM_Swig
 {
  public: