Mercurial > cpython-lru_cache-weakref

annotate Python/importdl.c @ 24866:f0dbd5b49d8a legacy-trunk

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Streamline the fast track for CFunction calls a bit more: there was nothing special done if keyword arguments were present, so test for that earlier and fall through to the normal case if there are any. This ought to slow down CFunction calls with keyword args, but I don't care; it's a tiny (1%) improvement for pystone.
author Guido van Rossum <guido@python.org>
date Fri, 16 Aug 2002 16:14:00 +0000
parents 2f0c5af4d5ea
children db49ee76b7d0
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1
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2 /* Support for dynamic loading of extension modules */
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3
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4 #include "Python.h"
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5
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6 /* ./configure sets HAVE_DYNAMIC_LOADING if dynamic loading of modules is
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7 supported on this platform. configure will then compile and link in one
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8 of the dynload_*.c files, as appropriate. We will call a function in
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9 those modules to get a function pointer to the module's init function.
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10 */
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11 #ifdef HAVE_DYNAMIC_LOADING
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13 #include "importdl.h"
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15 extern dl_funcptr _PyImport_GetDynLoadFunc(const char *name,
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16 const char *shortname,
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17 const char *pathname, FILE *fp);
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21 PyObject *
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22 _PyImport_LoadDynamicModule(char *name, char *pathname, FILE *fp)
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23 {
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24 PyObject *m, *d, *s;
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25 char *lastdot, *shortname, *packagecontext, *oldcontext;
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26 dl_funcptr p;
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28 if ((m = _PyImport_FindExtension(name, pathname)) != NULL) {
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29 Py_INCREF(m);
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30 return m;
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31 }
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32 lastdot = strrchr(name, '.');
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33 if (lastdot == NULL) {
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34 packagecontext = NULL;
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35 shortname = name;
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36 }
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37 else {
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38 packagecontext = name;
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39 shortname = lastdot+1;
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40 }
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41
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42 p = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp);
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43 if (PyErr_Occurred())
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44 return NULL;
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45 if (p == NULL) {
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46 PyErr_Format(PyExc_ImportError,
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47 "dynamic module does not define init function (init%.200s)",
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48 shortname);
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49 return NULL;
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50 }
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51 oldcontext = _Py_PackageContext;
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52 _Py_PackageContext = packagecontext;
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53 (*p)();
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54 _Py_PackageContext = oldcontext;
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55 if (PyErr_Occurred())
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56 return NULL;
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57 if (_PyImport_FixupExtension(name, pathname) == NULL)
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58 return NULL;
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60 m = PyDict_GetItemString(PyImport_GetModuleDict(), name);
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61 if (m == NULL) {
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62 PyErr_SetString(PyExc_SystemError,
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63 "dynamic module not initialized properly");
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64 return NULL;
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65 }
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66 /* Remember the filename as the __file__ attribute */
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67 d = PyModule_GetDict(m);
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68 s = PyString_FromString(pathname);
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69 if (s == NULL || PyDict_SetItemString(d, "__file__", s) != 0)
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70 PyErr_Clear(); /* Not important enough to report */
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71 Py_XDECREF(s);
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72 if (Py_VerboseFlag)
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73 PySys_WriteStderr(
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74 "import %s # dynamically loaded from %s\n",
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75 name, pathname);
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76 Py_INCREF(m);
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77 return m;
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78 }
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80 #endif /* HAVE_DYNAMIC_LOADING */