https://github.com/python/cpython/commit/25275bda790e8a689092e83855d6d0574f26061b
commit: 25275bda790e8a689092e83855d6d0574f26061b
branch: main
author: Donghee Na <donghee...@python.org>
committer: corona10 <donghee.n...@gmail.com>
date: 2025-04-02T15:04:07Z
summary:
gh-131544: Update docs for PyType_AddWatcher (gh-132015)
files:
M Doc/c-api/type.rst
diff --git a/Doc/c-api/type.rst b/Doc/c-api/type.rst
index 862f1e67b9ad2d..ec2867b0ce09ba 100644
--- a/Doc/c-api/type.rst
+++ b/Doc/c-api/type.rst
@@ -82,6 +82,9 @@ Type Objects
error (e.g. no more watcher IDs available), return ``-1`` and set an
exception.
+ In free-threaded builds, :c:func:`PyType_AddWatcher` is not thread-safe,
+ so it must be called at start up (before spawning the first thread).
+
.. versionadded:: 3.12
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