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-rw-r--r--Modules/_threadmodule.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/Modules/_threadmodule.c b/Modules/_threadmodule.c
index fa98df516b8..e77e30dfe5e 100644
--- a/Modules/_threadmodule.c
+++ b/Modules/_threadmodule.c
@@ -490,6 +490,18 @@ PyDoc_STRVAR(rlock_release_save_doc,
\n\
For internal use by `threading.Condition`.");
+static PyObject *
+rlock_recursion_count(rlockobject *self, PyObject *Py_UNUSED(ignored))
+{
+ unsigned long tid = PyThread_get_thread_ident();
+ return PyLong_FromUnsignedLong(
+ self->rlock_owner == tid ? self->rlock_count : 0UL);
+}
+
+PyDoc_STRVAR(rlock_recursion_count_doc,
+"_recursion_count() -> int\n\
+\n\
+For internal use by reentrancy checks.");
static PyObject *
rlock_is_owned(rlockobject *self, PyObject *Py_UNUSED(ignored))
@@ -565,6 +577,8 @@ static PyMethodDef rlock_methods[] = {
METH_VARARGS, rlock_acquire_restore_doc},
{"_release_save", (PyCFunction)rlock_release_save,
METH_NOARGS, rlock_release_save_doc},
+ {"_recursion_count", (PyCFunction)rlock_recursion_count,
+ METH_NOARGS, rlock_recursion_count_doc},
{"__enter__", _PyCFunction_CAST(rlock_acquire),
METH_VARARGS | METH_KEYWORDS, rlock_acquire_doc},
{"__exit__", (PyCFunction)rlock_release,