ref: dab539cd14726de15932b0310532212f8da29bf7
dir: /sys/src/cmd/python/Python/importdl.c/
/* 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 */