1 files changed, 72 insertions, 0 deletions
diff --git a/include/vcl/vclreferencebase.hxx b/include/vcl/vclreferencebase.hxx
new file mode 100644
index 0000000000..2ba39026a3
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+++ b/include/vcl/vclreferencebase.hxx
@@ -0,0 +1,72 @@
+/* -*- 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 .
+ */
+#ifndef INCLUDED_VCL_Reference_HXX
+#define INCLUDED_VCL_Reference_HXX
+
+#include <vcl/dllapi.h>
+#include <osl/interlck.h>
+
+class VclBuilder;
+
+class VCL_DLLPUBLIC VclReferenceBase
+{
+    mutable oslInterlockedCount mnRefCnt;
+
+    template<typename T> friend class VclPtr;
+    friend class ::VclBuilder; // needed by ::delete_by_window(vcl::Window *pWindow)
+
+public:
+    void acquire() const
+    {
+        osl_atomic_increment(&mnRefCnt);
+    }
+
+    void release() const
+    {
+        if (osl_atomic_decrement(&mnRefCnt) == 0)
+            delete this;
+    }
+#ifdef DBG_UTIL
+#ifndef _WIN32
+    sal_Int32 getRefCount() const { return mnRefCnt; }
+#endif
+#endif
+
+
+private:
+    VclReferenceBase(const VclReferenceBase&) = delete;
+    VclReferenceBase& operator=(const VclReferenceBase&) = delete;
+
+    bool                        mbDisposed : 1;
+
+protected:
+                                VclReferenceBase();
+    virtual                     ~VclReferenceBase();
+
+    // This is only supposed to be called from disposeOnce
+    virtual void                dispose();
+
+public:
+    // This is normally supposed to be called from VclPtr::disposeAndClear
+    void                        disposeOnce();
+
+    bool                        isDisposed() const { return mbDisposed; }
+
+};
+#endif