\class PyConsole_Interp
\brief Python interpreter to be embedded to the SALOME study's GUI.
- Python interpreter is created one per SALOME study.
+ There is only one Python interpreter for the whole SALOME environment.
- Call initialize method defined in the base class PyInterp_Interp,
- to intialize interpreter after instance creation.
+ Call the initialize() method defined in the base class PyInterp_Interp,
+ to initialize the interpreter after instance creation.
The method initialize() calls virtuals methods
- initPython() to initialize global Python interpreter
- - initState() to initialize embedded interpreter state
+ //- initState() to initialize embedded interpreter state (OBSOLETE)
- initContext() to initialize interpreter internal context
- initRun() to prepare interpreter for running commands
-
- /EDF-CCAR/
- When SALOME uses multi Python interpreter feature,
- every study has its own interpreter and thread state (_tstate = Py_NewInterpreter()).
- This is fine because every study has its own modules (sys.modules) stdout and stderr.
-
- <b>But</b> some Python modules must be imported only once. In multi interpreter
- context Python modules (*.py) are imported several times.
- For example, the PyQt module must be imported only once because
- it registers classes in a C module.
-
- It's quite the same with omniorb modules (internals and generated with omniidl).
-
- This problem is handled with "shared modules" defined in salome_shared_modules.py.
- These "shared modules" are imported only once and only copied in all
- the other interpreters.
-
- <b>But</b> it's not the only problem. Every interpreter has its own
- __builtin__ module. That's fine but if we have copied some modules
- and imported others problems may arise with operations that are not allowed
- in restricted execution environment. So we must impose that all interpreters
- have identical __builtin__ module.
*/
/*!
{
}
-/*!
- \brief Initialize internal Python interpreter state.
-
- When calling initState the GIL is not held
- It must not be held on exit
-
- \return \c true on success
-*/
-bool PyConsole_Interp::initState()
-{
- PyEval_AcquireLock();
- _tstate = Py_NewInterpreter(); // create an interpreter and save current state
- PySys_SetArgv(PyInterp_Interp::_argc,PyInterp_Interp::_argv); // initialize sys.argv
-
- if(!builtinmodule) // PAL18041: deepcopy function don't work in Salome
- {
- //builtinmodule is static member of PyInterp class
- //If it is not NULL (initialized to the builtin module of the main interpreter
- //all the sub interpreters will have the same builtin
- //_interp is a static member and is the main interpreter
- //The first time we initialized it to the builtin of main interpreter
- builtinmodule=PyDict_GetItemString(_interp->modules, "__builtin__");
- }
-
- //If builtinmodule has been initialized all the sub interpreters
- // will have the same __builtin__ module
- if(builtinmodule){
- PyObject *m = PyImport_GetModuleDict();
- PyDict_SetItemString(m, "__builtin__", builtinmodule);
- _tstate->interp->builtins = PyModule_GetDict(builtinmodule);
- Py_INCREF(_tstate->interp->builtins);
- }
- PyEval_ReleaseThread(_tstate);
- return true;
-}
-
/*!
\brief Initialize python interpeter context.
PyErr_Print();
return false;
}
- _g = PyModule_GetDict(m); // get interpreter dictionnary context
-
- if(builtinmodule){
- PyDict_SetItemString(_g, "__builtins__", builtinmodule); // assign singleton __builtin__ module
- }
+ _context = PyModule_GetDict(m); // get interpreter dictionnary context
return true;
}
