/* 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 *shortname, const char *pathname, FILE *fp); /* name should be ASCII only because the C language doesn't accept non-ASCII identifiers, and dynamic modules are written in C. */ PyObject * _PyImport_LoadDynamicModule(PyObject *name, PyObject *path, FILE *fp) { PyObject *m; PyObject *pathbytes; char *namestr, *lastdot, *shortname, *packagecontext, *oldcontext; dl_funcptr p0; PyObject* (*p)(void); struct PyModuleDef *def; namestr = _PyUnicode_AsString(name); if (namestr == NULL) return NULL; m = _PyImport_FindExtensionObject(name, path); if (m != NULL) { Py_INCREF(m); return m; } lastdot = strrchr(namestr, '.'); if (lastdot == NULL) { packagecontext = NULL; shortname = namestr; } else { packagecontext = namestr; shortname = lastdot+1; } pathbytes = PyUnicode_EncodeFSDefault(path); if (pathbytes == NULL) return NULL; p0 = _PyImport_GetDynLoadFunc(shortname, PyBytes_AS_STRING(pathbytes), fp); Py_DECREF(pathbytes); p = (PyObject*(*)(void))p0; if (PyErr_Occurred()) return NULL; if (p == NULL) { PyErr_Format(PyExc_ImportError, "dynamic module does not define init function" " (PyInit_%s)", shortname); return NULL; } oldcontext = _Py_PackageContext; _Py_PackageContext = packagecontext; m = (*p)(); _Py_PackageContext = oldcontext; if (m == NULL) return NULL; if (PyErr_Occurred()) { Py_DECREF(m); PyErr_Format(PyExc_SystemError, "initialization of %s raised unreported exception", shortname); return NULL; } /* Remember pointer to module init function. */ def = PyModule_GetDef(m); def->m_base.m_init = p; /* Remember the filename as the __file__ attribute */ if (PyModule_AddObject(m, "__file__", path) < 0) PyErr_Clear(); /* Not important enough to report */ else Py_INCREF(path); if (_PyImport_FixupExtensionObject(m, name, path) < 0) return NULL; if (Py_VerboseFlag) PySys_FormatStderr( "import %U # dynamically loaded from %R\n", name, path); return m; } #endif /* HAVE_DYNAMIC_LOADING */