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-rw-r--r--comphelper/source/misc/solarmutex.cxx103
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diff --git a/comphelper/source/misc/solarmutex.cxx b/comphelper/source/misc/solarmutex.cxx
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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 .
+ */
+
+#include <sal/config.h>
+
+#include <comphelper/solarmutex.hxx>
+#include <osl/thread.hxx>
+
+#include <assert.h>
+#include <cstdlib>
+
+namespace comphelper {
+
+namespace {
+ SolarMutex* g_pSolarMutex = nullptr;
+}
+
+SolarMutex *SolarMutex::get()
+{
+ return g_pSolarMutex;
+}
+
+SolarMutex::SolarMutex()
+ : m_nCount( 0 )
+ , m_nThreadId( 0 )
+ , m_aBeforeReleaseHandler( nullptr )
+{
+ assert(!g_pSolarMutex);
+ g_pSolarMutex = this;
+}
+
+SolarMutex::~SolarMutex()
+{
+ g_pSolarMutex = nullptr;
+}
+
+void SolarMutex::doAcquire( const sal_uInt32 nLockCount )
+{
+ for ( sal_uInt32 n = nLockCount; n ; --n )
+ m_aMutex.acquire();
+ m_nThreadId = osl::Thread::getCurrentIdentifier();
+ m_nCount += nLockCount;
+}
+
+sal_uInt32 SolarMutex::doRelease( bool bUnlockAll )
+{
+ if ( !IsCurrentThread() )
+ std::abort();
+ if ( m_nCount == 0 )
+ std::abort();
+
+ const sal_uInt32 nCount = bUnlockAll ? m_nCount : 1;
+ m_nCount -= nCount;
+
+ if ( 0 == m_nCount )
+ {
+ if ( m_aBeforeReleaseHandler )
+ m_aBeforeReleaseHandler();
+ m_nThreadId = 0;
+ }
+
+ for ( sal_uInt32 n = nCount ; n ; --n )
+ m_aMutex.release();
+
+ return nCount;
+}
+
+bool SolarMutex::IsCurrentThread() const
+{
+ return m_nThreadId == osl::Thread::getCurrentIdentifier();
+}
+
+bool SolarMutex::tryToAcquire()
+{
+ if ( m_aMutex.tryToAcquire() )
+ {
+ m_nThreadId = osl::Thread::getCurrentIdentifier();
+ m_nCount++;
+ return true;
+ }
+ else
+ return false;
+}
+
+} // namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */