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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
commit940b4d1848e8c70ab7642901a68594e8016caffc (patch)
treeeb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /framework/inc/helper/shareablemutex.hxx
parentInitial commit. (diff)
downloadlibreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.tar.xz
libreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.zip
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'framework/inc/helper/shareablemutex.hxx')
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+/* -*- 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_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
+#define INCLUDED_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
+
+#include <osl/interlck.h>
+#include <osl/mutex.hxx>
+#include <fwidllapi.h>
+
+namespace framework
+{
+
+/**
+ * This acts like a rtl::Reference<osl::Mutex>
+ */
+class ShareableMutex
+{
+ public:
+ ShareableMutex();
+ ShareableMutex( const ShareableMutex& rShareableMutex );
+ ShareableMutex& operator=( const ShareableMutex& rShareableMutex );
+
+ ~ShareableMutex() { m_pMutexRef->release(); }
+
+ /** acquire the shared mutex */
+ void acquire();
+ /** release the shared mutex */
+ void release();
+
+ private:
+ /* ShareableMutex::MutexRef will destroy itself when the last ShareableMutex pointing to it is destroyed */
+ struct MutexRef
+ {
+ MutexRef() : m_refCount(0) {}
+ void acquire()
+ {
+ osl_atomic_increment( &m_refCount );
+ }
+
+ void release()
+ {
+ if ( osl_atomic_decrement( &m_refCount ) == 0 )
+ delete this;
+ }
+
+ oslInterlockedCount m_refCount;
+ osl::Mutex m_oslMutex;
+ };
+
+ MutexRef* m_pMutexRef;
+};
+
+class ShareGuard
+{
+ public:
+ explicit ShareGuard( ShareableMutex& rShareMutex ) :
+ m_rShareMutex( rShareMutex )
+ {
+ m_rShareMutex.acquire();
+ }
+
+ ~ShareGuard()
+ {
+ m_rShareMutex.release();
+ }
+
+ private:
+ ShareGuard& operator=( const ShareGuard& ) = delete;
+
+ ShareableMutex& m_rShareMutex;
+};
+
+}
+
+#endif // INCLUDED_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */