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/* 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;
PyObject *path;
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 */
path = PyUnicode_DecodeFSDefault(pathname);
if (PyModule_AddObject(m, "__file__", path) < 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 */
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