|
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 */ |