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 *
_PyImport_LoadDynamicModule(char * name,char * pathname,FILE * fp)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