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// embed.cc -- C++ part of embedding example
#include <iostream.h>
#include <echo.hh>
#include PYTHON_INCLUDE
#include <omniORBpy.h>
#ifdef __WIN32__
#define DLL_EXPORT _declspec(dllexport)
#else
#define DLL_EXPORT
#endif
class Echo_i : public POA_Echo,
public PortableServer::RefCountServantBase
{
public:
inline Echo_i() {}
virtual ~Echo_i() {}
virtual char* echoString(const char* mesg);
};
char* Echo_i::echoString(const char* mesg)
{
cout << "C++ upcall '" << mesg << "'" << endl;
return CORBA::string_dup(mesg);
}
class InterpreterUnlocker {
public:
InterpreterUnlocker() {
tstate_ = PyEval_SaveThread();
}
~InterpreterUnlocker() {
PyEval_RestoreThread(tstate_);
}
private:
PyThreadState* tstate_;
};
// This function retrieves the omniORBpyAPI struct from the _omnipy
// Python module.
static omniORBpyAPI*
getAPI()
{
PyObject* omnipy = PyImport_ImportModule((char*)"_omnipy");
if (!omnipy) {
PyErr_SetString(PyExc_ImportError,
(char*)"Cannot import _omnipy");
return 0;
}
PyObject* pyapi = PyObject_GetAttrString(omnipy, (char*)"API");
omniORBpyAPI* api = (omniORBpyAPI*)PyCObject_AsVoidPtr(pyapi);
Py_DECREF(pyapi);
return api;
}
extern "C" {
static PyObject* EmbedGetObjRef(PyObject* self, PyObject* args)
{
PyObject* pyorb;
if (!PyArg_ParseTuple(args, (char*)"O", &pyorb)) return 0;
omniORBpyAPI* api = getAPI();
if (!api)
return 0;
CORBA::Object_var obj;
CORBA::ORB_var orb;
try {
// Python code gave us the ORB reference; convert it to the C++ reference
obj = api->pyObjRefToCxxObjRef(pyorb, 1);
orb = CORBA::ORB::_narrow(obj);
}
catch (CORBA::BAD_PARAM& ex) {
PyErr_SetString(PyExc_TypeError,
(char*)"getObjRef() expects ORB as its argument");
return 0;
}
// Activate an Echo object in the Root POA
obj = orb->resolve_initial_references("RootPOA");
PortableServer::POA_var poa = PortableServer::POA::_narrow(obj);
Echo_i* myecho = new Echo_i();
PortableServer::ObjectId_var myechoid = poa->activate_object(myecho);
obj = myecho->_this();
myecho->_remove_ref();
PortableServer::POAManager_var pman = poa->the_POAManager();
pman->activate();
// Return the Echo reference to Python
PyObject* ret = api->cxxObjRefToPyObjRef(obj, 1);
return ret;
}
static PyObject* EmbedPutObjRef(PyObject* self, PyObject* args)
{
PyObject* pyobj;
if (!PyArg_ParseTuple(args, (char*)"O", &pyobj)) return 0;
omniORBpyAPI* api = getAPI();
if (!api)
return 0;
CORBA::Object_var obj;
Echo_var eobj;
try {
obj = api->pyObjRefToCxxObjRef(pyobj, 1);
}
catch (CORBA::SystemException& ex) {
PyErr_SetString(PyExc_TypeError,
(char*)"putObjRef() expects CORBA object argument");
return 0;
}
eobj = Echo::_narrow(obj);
if (CORBA::is_nil(eobj)) {
PyErr_SetString(PyExc_TypeError,
(char*)"putObjRef() argument not an Echo");
return 0;
}
{
// To do the call into Python, we must release the Python
// interpreter lock, since the code doing the upcall acquires
// it. The InterpreterUnlocker class deals with it for us.
InterpreterUnlocker _u;
cout << "\nTrying call to Python object..." << endl;
CORBA::String_var ret = eobj->echoString("Hello from C++");
cout << "The result was '" << (char*)ret << "'" << endl;
}
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef embed_methods[] = {
{(char*)"getObjRef", EmbedGetObjRef, METH_VARARGS},
{(char*)"putObjRef", EmbedPutObjRef, METH_VARARGS},
{NULL, NULL}
};
void DLL_EXPORT init_embed()
{
PyObject* m = Py_InitModule((char*)"_embed", embed_methods);
}
}
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