Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/sd/inc/helper/simplereferencecomponent.hxx b/sd/inc/helper/simplereferencecomponent.hxx
new file mode 100644
index 000000000..89e43639e
--- /dev/null
+++ b/sd/inc/helper/simplereferencecomponent.hxx
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <osl/interlck.h>
+
+namespace sd
+{
+/** A simple base implementation for reference-counted components.
+    acts like sal::SimpleReferenceObject but calls the virtual disposing()
+    methods before the ref count switches from 1 to zero.
+ */
+class SimpleReferenceComponent
+{
+public:
+    SimpleReferenceComponent();
+
+    /** @ATTENTION
+        The results are undefined if, for any individual instance of
+        SimpleReferenceComponent, the total number of calls to acquire() exceeds
+        the total number of calls to release() by a platform dependent amount
+        (which, hopefully, is quite large).
+     */
+    void acquire();
+    void release();
+
+    void Dispose();
+
+    bool isDisposed() const { return mbDisposed; }
+
+protected:
+    virtual void disposing();
+
+    virtual ~SimpleReferenceComponent();
+
+private:
+    oslInterlockedCount m_nCount;
+
+    SimpleReferenceComponent(SimpleReferenceComponent const&) = delete;
+    void operator=(SimpleReferenceComponent const&) = delete;
+
+    bool mbDisposed;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */