151 lines
4.8 KiB
C
151 lines
4.8 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include "system.h"
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#include <osl/armarch.h>
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#include <osl/interlck.h>
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#include <osl/diagnose.h>
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#if ( defined ( SOLARIS ) || defined ( NETBSD ) ) && defined ( SPARC )
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#error please use asm/interlck_sparc.s
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#elif defined ( SOLARIS) && defined ( X86 )
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#error please use asm/interlck_x86.s
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#elif defined ( GCC ) && ( defined ( X86 ) || defined ( X86_64 ) )
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/* That's possible on x86-64 too since oslInterlockedCount is a sal_Int32 */
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extern int osl_isSingleCPU;
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/*****************************************************************************/
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/* osl_incrementInterlockedCount */
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/*****************************************************************************/
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oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
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{
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// Fast case for old, slow, single CPU Intel machines for whom
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// interlocking is a performance nightmare.
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register oslInterlockedCount nCount asm("%eax");
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nCount = 1;
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if ( osl_isSingleCPU ) {
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__asm__ __volatile__ (
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"xaddl %0, %1\n\t"
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: "+r" (nCount), "+m" (*pCount)
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: /* nothing */
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: "memory");
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return ++nCount;
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}
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#if ( __GNUC__ > 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ >= 4 ))
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else
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return __sync_add_and_fetch (pCount, 1);
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#else
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else {
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__asm__ __volatile__ (
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"lock\n\t"
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"xaddl %0, %1\n\t"
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: "+r" (nCount), "+m" (*pCount)
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: /* nothing */
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: "memory");
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}
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return ++nCount;
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#endif
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}
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oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
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{
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register oslInterlockedCount nCount asm("%eax");
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nCount = -1;
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if ( osl_isSingleCPU ) {
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__asm__ __volatile__ (
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"xaddl %0, %1\n\t"
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: "+r" (nCount), "+m" (*pCount)
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: /* nothing */
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: "memory");
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return --nCount;
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}
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#if ( __GNUC__ > 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ >= 4 ))
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else
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return __sync_sub_and_fetch (pCount, 1);
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#else
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else {
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__asm__ __volatile__ (
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"lock\n\t"
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"xaddl %0, %1\n\t"
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: "+r" (nCount), "+m" (*pCount)
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: /* nothing */
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: "memory");
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}
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return --nCount;
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#endif
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}
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#elif ( __GNUC__ > 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ >= 4 ))
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oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
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{
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return __sync_add_and_fetch(pCount, 1);
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}
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oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
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{
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return __sync_sub_and_fetch(pCount, 1);
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}
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#else
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/* use only if nothing else works, expensive due to single mutex for all reference counts */
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static pthread_mutex_t InterLock = PTHREAD_MUTEX_INITIALIZER;
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/*****************************************************************************/
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/* osl_incrementInterlockedCount */
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/*****************************************************************************/
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oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
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{
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oslInterlockedCount Count;
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pthread_mutex_lock(&InterLock);
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Count = ++(*pCount);
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pthread_mutex_unlock(&InterLock);
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return (Count);
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}
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/*****************************************************************************/
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/* osl_decrementInterlockedCount */
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/*****************************************************************************/
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oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
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{
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oslInterlockedCount Count;
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pthread_mutex_lock(&InterLock);
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Count = --(*pCount);
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pthread_mutex_unlock(&InterLock);
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return (Count);
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}
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#endif /* default */
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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