d72a0b5c61
We still have checks for $(COM) being GCC or MSC in makefiles, of course. But there is no reason to pass -D$(COM) to compilations. Checking the built-in compiler-specific macros __GNUC__, _MSC_VER (etc) is the right thing to do. Change-Id: Ia961a29ba74e2c4977e5300a92318f38104c6592
143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "system.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 ( __GNUC__ ) && ( 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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if ( osl_isSingleCPU ) {
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register oslInterlockedCount nCount asm("%eax");
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nCount = 1;
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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 defined( HAVE_GCC_BUILTIN_ATOMIC )
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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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register oslInterlockedCount nCount asm("%eax");
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nCount = 1;
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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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return ++nCount;
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}
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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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if ( osl_isSingleCPU ) {
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register oslInterlockedCount nCount asm("%eax");
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nCount = -1;
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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 defined( HAVE_GCC_BUILTIN_ATOMIC )
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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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register oslInterlockedCount nCount asm("%eax");
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nCount = -1;
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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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return --nCount;
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}
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#endif
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}
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#elif defined( HAVE_GCC_BUILTIN_ATOMIC )
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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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