mirror of
https://github.com/python/cpython.git
synced 2024-11-29 00:56:12 +01:00
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
|
|
/* 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 p0;
|
|
PyObject* (*p)(void);
|
|
struct PyModuleDef *def;
|
|
|
|
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;
|
|
}
|
|
|
|
p0 = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp);
|
|
p = (PyObject*(*)(void))p0;
|
|
if (PyErr_Occurred())
|
|
return NULL;
|
|
if (p == NULL) {
|
|
PyErr_Format(PyExc_ImportError,
|
|
"dynamic module does not define init function (PyInit_%.200s)",
|
|
shortname);
|
|
return NULL;
|
|
}
|
|
oldcontext = _Py_PackageContext;
|
|
_Py_PackageContext = packagecontext;
|
|
m = (*p)();
|
|
_Py_PackageContext = oldcontext;
|
|
if (m == NULL)
|
|
return NULL;
|
|
|
|
if (PyErr_Occurred()) {
|
|
Py_DECREF(m);
|
|
PyErr_Format(PyExc_SystemError,
|
|
"initialization of %s raised unreported exception",
|
|
shortname);
|
|
return NULL;
|
|
}
|
|
|
|
/* Remember pointer to module init function. */
|
|
def = PyModule_GetDef(m);
|
|
def->m_base.m_init = p;
|
|
|
|
/* 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(m, name, pathname) < 0)
|
|
return NULL;
|
|
if (Py_VerboseFlag)
|
|
PySys_WriteStderr(
|
|
"import %s # dynamically loaded from %s\n",
|
|
name, pathname);
|
|
return m;
|
|
}
|
|
|
|
#endif /* HAVE_DYNAMIC_LOADING */
|