/* Support for dynamic loading of extension modules */ #include "Python.h" /* ./configure sets HAVE_DYNAMIC_LOADING if dynamic loading of modules is   supported on this platform. configure will then compile and link in one   of the dynload_*.c files, as appropriate. We will call a function in   those modules to get a function pointer to the module's init function.*/#ifdef HAVE_DYNAMIC_LOADING #include "importdl.h" extern dl_funcptr _PyImport_GetDynLoadFunc(const char *name,					   const char *shortname,					   const char *pathname, FILE *fp);   PyObject *_PyImport_LoadDynamicModule(char *name, char *pathname, FILE *fp){	PyObject *m;	char *lastdot, *shortname, *packagecontext, *oldcontext;	dl_funcptr p; 	if ((m = _PyImport_FindExtension(name, pathname)) != NULL) {		Py_INCREF(m);		return m;	}	lastdot = strrchr(name, '.');	if (lastdot == NULL) {		packagecontext = NULL;		shortname = name;	}	else {		packagecontext = name;		shortname = lastdot+1;	} 	p = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp);	if (PyErr_Occurred())		return NULL;	if (p == NULL) {		PyErr_Format(PyExc_ImportError,		   "dynamic module does not define init function (init%.200s)",			     shortname);		return NULL;	}        oldcontext = _Py_PackageContext;	_Py_PackageContext = packagecontext;	(*p)();	_Py_PackageContext = oldcontext;	if (PyErr_Occurred())		return NULL; 	m = PyDict_GetItemString(PyImport_GetModuleDict(), name);	if (m == NULL) {		PyErr_SetString(PyExc_SystemError,				"dynamic module not initialized properly");		return NULL;	}	/* Remember the filename as the __file__ attribute */	if (PyModule_AddStringConstant(m, "__file__", pathname) < 0)		PyErr_Clear(); /* Not important enough to report */ 	if (_PyImport_FixupExtension(name, pathname) == NULL)		return NULL;	if (Py_VerboseFlag)		PySys_WriteStderr(			"import %s # dynamically loaded from %s\n",			name, pathname);	Py_INCREF(m);	return m;} #endif /* HAVE_DYNAMIC_LOADING */