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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /comphelper/source/misc/solarmutex.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-upstream/4%7.4.7.tar.xz libreoffice-upstream/4%7.4.7.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | comphelper/source/misc/solarmutex.cxx | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/comphelper/source/misc/solarmutex.cxx b/comphelper/source/misc/solarmutex.cxx new file mode 100644 index 000000000..5d1052327 --- /dev/null +++ b/comphelper/source/misc/solarmutex.cxx @@ -0,0 +1,103 @@ +/* -*- 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: */ |