/Python/importdl.c
http://unladen-swallow.googlecode.com/ · C · 78 lines · 58 code · 13 blank · 7 comment · 15 complexity · 5ba2be4c77f8e18101955e85eb4891be MD5 · raw file
- /* 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 */