From 69ac6e58fd98de339c013fe64cd1cf763e4f9bca Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Thu, 4 Jun 2020 23:38:36 +0200
Subject: bpo-40521: Make tuple free list per-interpreter (GH-20247)

Each interpreter now has its own tuple free lists:

* Move tuple numfree and free_list arrays into PyInterpreterState.
* Define PyTuple_MAXSAVESIZE and PyTuple_MAXFREELIST macros in
  pycore_interp.h.
* Add _Py_tuple_state structure. Pass it explicitly to tuple_alloc().
* Add tstate parameter to _PyTuple_ClearFreeList()
* Each interpreter now has its own empty tuple singleton.
---
 Modules/gcmodule.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'Modules/gcmodule.c')

diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index a44752b1cc..1f5aa936e4 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -1025,8 +1025,9 @@ delete_garbage(PyThreadState *tstate, GCState *gcstate,
 static void
 clear_freelists(void)
 {
+    PyThreadState *tstate = _PyThreadState_GET();
     _PyFrame_ClearFreeList();
-    _PyTuple_ClearFreeList();
+    _PyTuple_ClearFreeList(tstate);
     _PyFloat_ClearFreeList();
     _PyList_ClearFreeList();
     _PyDict_ClearFreeList();
-- 
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