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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
commit | 940b4d1848e8c70ab7642901a68594e8016caffc (patch) | |
tree | eb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /sal/osl/unx/interlck.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-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 'sal/osl/unx/interlck.cxx')
-rw-r--r-- | sal/osl/unx/interlck.cxx | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/sal/osl/unx/interlck.cxx b/sal/osl/unx/interlck.cxx new file mode 100644 index 000000000..81404cb57 --- /dev/null +++ b/sal/osl/unx/interlck.cxx @@ -0,0 +1,95 @@ +/* -*- 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 "system.hxx" + +#include <config_global.h> +#include <osl/interlck.h> + +#if ( defined (__sun) || defined ( NETBSD ) ) && defined ( SPARC ) +#error please use asm/interlck_sparc.s +#elif defined (__sun) && defined ( X86 ) +#error please use asm/interlck_x86.s +#elif HAVE_GCC_BUILTIN_ATOMIC +oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) +{ + return __sync_add_and_fetch(pCount, 1); +} +oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount) +{ + return __sync_sub_and_fetch(pCount, 1); +} +#elif defined ( __GNUC__ ) && ( defined ( X86 ) || defined ( X86_64 ) ) +/* That's possible on x86-64 too since oslInterlockedCount is a sal_Int32 */ + +oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) +{ + register oslInterlockedCount nCount asm("%eax"); + nCount = 1; + __asm__ __volatile__ ( + "lock\n\t" + "xaddl %0, %1\n\t" + : "+r" (nCount), "+m" (*pCount) + : /* nothing */ + : "memory"); + return ++nCount; +} + +oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount) +{ + register oslInterlockedCount nCount asm("%eax"); + nCount = -1; + __asm__ __volatile__ ( + "lock\n\t" + "xaddl %0, %1\n\t" + : "+r" (nCount), "+m" (*pCount) + : /* nothing */ + : "memory"); + return --nCount; +} +#else +/* use only if nothing else works, expensive due to single mutex for all reference counts */ + +static pthread_mutex_t InterLock = PTHREAD_MUTEX_INITIALIZER; + +oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) +{ + oslInterlockedCount Count; + + pthread_mutex_lock(&InterLock); + Count = ++(*pCount); + pthread_mutex_unlock(&InterLock); + + return Count; +} + +oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount) +{ + oslInterlockedCount Count; + + pthread_mutex_lock(&InterLock); + Count = --(*pCount); + pthread_mutex_unlock(&InterLock); + + return Count; +} + +#endif /* default */ + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |