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annotate Python/importdl.c @ 53207:fe99a562b708

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Silence compiler warnings on VS8.0
author Mark Dickinson <dickinsm@gmail.com>
date Fri, 17 Apr 2009 19:29:46 +0000
parents 94f64f11fdd0
children cab14be0ada1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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12
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13 #include "importdl.h"
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14
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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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18
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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;
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25 PyObject *path;
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26 char *lastdot, *shortname, *packagecontext, *oldcontext;
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27 dl_funcptr p0;
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28 PyObject* (*p)(void);
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29 struct PyModuleDef *def;
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31 if ((m = _PyImport_FindExtension(name, pathname)) != NULL) {
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32 Py_INCREF(m);
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33 return m;
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34 }
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35 lastdot = strrchr(name, '.');
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36 if (lastdot == NULL) {
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37 packagecontext = NULL;
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38 shortname = name;
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39 }
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40 else {
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41 packagecontext = name;
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42 shortname = lastdot+1;
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43 }
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44
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45 p0 = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp);
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46 p = (PyObject*(*)(void))p0;
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47 if (PyErr_Occurred())
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48 return NULL;
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49 if (p == NULL) {
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50 PyErr_Format(PyExc_ImportError,
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51 "dynamic module does not define init function (PyInit_%.200s)",
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52 shortname);
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53 return NULL;
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54 }
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55 oldcontext = _Py_PackageContext;
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56 _Py_PackageContext = packagecontext;
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57 m = (*p)();
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58 _Py_PackageContext = oldcontext;
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59 if (m == NULL)
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60 return NULL;
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61
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62 if (PyErr_Occurred()) {
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63 Py_DECREF(m);
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64 PyErr_Format(PyExc_SystemError,
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65 "initialization of %s raised unreported exception",
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66 shortname);
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67 return NULL;
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68 }
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70 /* Remember pointer to module init function. */
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71 def = PyModule_GetDef(m);
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72 def->m_base.m_init = p;
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73
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74 /* Remember the filename as the __file__ attribute */
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75 path = PyUnicode_DecodeFSDefault(pathname);
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76 if (PyModule_AddObject(m, "__file__", path) < 0)
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77 PyErr_Clear(); /* Not important enough to report */
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78
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79 if (_PyImport_FixupExtension(m, name, pathname) < 0)
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80 return NULL;
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81 if (Py_VerboseFlag)
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82 PySys_WriteStderr(
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83 "import %s # dynamically loaded from %s\n",
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84 name, pathname);
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85 return m;
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86 }
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88 #endif /* HAVE_DYNAMIC_LOADING */