From 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 20:24:20 +0200
Subject: Adding upstream version 14.2.21.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/mgr/Gil.h | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/mgr/Gil.h

(limited to 'src/mgr/Gil.h')

diff --git a/src/mgr/Gil.h b/src/mgr/Gil.h
new file mode 100644
index 00000000..bff2d233
--- /dev/null
+++ b/src/mgr/Gil.h
@@ -0,0 +1,72 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2017 SUSE LLC
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#pragma once
+
+struct _ts;
+typedef struct _ts PyThreadState;
+
+#include <pthread.h>
+
+
+/**
+ * Wrap PyThreadState to carry a record of which POSIX thread
+ * the thread state relates to.  This allows the Gil class to
+ * validate that we're being used from the right thread.
+ */
+class SafeThreadState
+{
+  public:
+  explicit SafeThreadState(PyThreadState *ts_);
+
+  SafeThreadState()
+    : ts(nullptr), thread(0)
+  {
+  }
+
+  PyThreadState *ts;
+  pthread_t thread;
+
+  void set(PyThreadState *ts_)
+  {
+    ts = ts_;
+    thread = pthread_self();
+  }
+};
+
+//
+// Use one of these in any scope in which you need to hold Python's
+// Global Interpreter Lock.
+//
+// Do *not* nest these, as a second GIL acquire will deadlock (see
+// https://docs.python.org/2/c-api/init.html#c.PyEval_RestoreThread)
+//
+// If in doubt, explicitly put a scope around the block of code you
+// know you need the GIL in.
+//
+// See the comment in Gil::Gil for when to set new_thread == true
+//
+class Gil {
+public:
+  Gil(const Gil&) = delete;
+  Gil& operator=(const Gil&) = delete;
+
+  Gil(SafeThreadState &ts, bool new_thread = false);
+  ~Gil();
+
+private:
+  SafeThreadState &pThreadState;
+  PyThreadState *pNewThreadState = nullptr;
+};
+
-- 
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