1 2 /* Support for dynamic loading of extension modules */ 3 4 #include "Python.h" 5 6 /* ./configure sets HAVE_DYNAMIC_LOADING if dynamic loading of modules is 7 supported on this platform. configure will then compile and link in one 8 of the dynload_*.c files, as appropriate. We will call a function in 9 those modules to get a function pointer to the module's init function. 10 */ 11 #ifdef HAVE_DYNAMIC_LOADING 12 13 #include "importdl.h" 14 15 extern dl_funcptr _PyImport_GetDynLoadFunc(const char *name, 16 const char *shortname, 17 const char *pathname, FILE *fp); 18 19 20 21 PyObject * 22 _PyImport_LoadDynamicModule(char *name, char *pathname, FILE *fp) 23 { 24 PyObject *m; 25 char *lastdot, *shortname, *packagecontext, *oldcontext; 26 dl_funcptr p; 27 28 if ((m = _PyImport_FindExtension(name, pathname)) != NULL) { 29 Py_INCREF(m); 30 return m; 31 } 32 lastdot = strrchr(name, '.'); 33 if (lastdot == NULL) { 34 packagecontext = NULL; 35 shortname = name; 36 } 37 else { 38 packagecontext = name; 39 shortname = lastdot+1; 40 } 41 42 p = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp); 43 if (PyErr_Occurred()) 44 return NULL; 45 if (p == NULL) { 46 PyErr_Format(PyExc_ImportError, 47 "dynamic module does not define init function (init%.200s)", 48 shortname); 49 return NULL; 50 } 51 oldcontext = _Py_PackageContext; 52 _Py_PackageContext = packagecontext; 53 (*p)(); 54 _Py_PackageContext = oldcontext; 55 if (PyErr_Occurred()) 56 return NULL; 57 58 m = PyDict_GetItemString(PyImport_GetModuleDict(), name); 59 if (m == NULL) { 60 PyErr_SetString(PyExc_SystemError, 61 "dynamic module not initialized properly"); 62 return NULL; 63 } 64 /* Remember the filename as the __file__ attribute */ 65 if (PyModule_AddStringConstant(m, "__file__", pathname) < 0) 66 PyErr_Clear(); /* Not important enough to report */ 67 68 if (_PyImport_FixupExtension(name, pathname) == NULL) 69 return NULL; 70 if (Py_VerboseFlag) 71 PySys_WriteStderr( 72 "import %s # dynamically loaded from %s\n", 73 name, pathname); 74 Py_INCREF(m); 75 return m; 76 } 77 78 #endif /* HAVE_DYNAMIC_LOADING */ 79
