From 8dcde94c6068d7bb9c006091217617e2c11f75a9 Mon Sep 17 00:00:00 2001
From: Kristj?n Valur J?nsson <sweskman@gmail.com>
Date: Sat, 23 Mar 2013 03:36:16 -0700
Subject: Issue #17522: Add the PyGILState_Check() API.

---
 Python/pystate.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'Python/pystate.c')

diff --git a/Python/pystate.c b/Python/pystate.c
index cfd61d0098..70038936d6 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -697,6 +697,15 @@ PyGILState_GetThisThreadState(void)
     return (PyThreadState *)PyThread_get_key_value(autoTLSkey);
 }
 
+int
+PyGILState_Check(void)
+{
+    /* can't use PyThreadState_Get() since it will assert that it has the GIL */
+    PyThreadState *tstate = (PyThreadState*)_Py_atomic_load_relaxed(
+        &_PyThreadState_Current);
+    return tstate && (tstate == PyGILState_GetThisThreadState());
+}
+
 PyGILState_STATE
 PyGILState_Ensure(void)
 {
-- 
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