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Diffstat (limited to 'sal/osl/unx/interlck.c')
| -rw-r--r-- | sal/osl/unx/interlck.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/sal/osl/unx/interlck.c b/sal/osl/unx/interlck.c new file mode 100644 index 000000000000..f8630c97a4f1 --- /dev/null +++ b/sal/osl/unx/interlck.c @@ -0,0 +1,173 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + + +#include "system.h" + +#include <osl/interlck.h> +#include <osl/diagnose.h> + +#if ( defined ( SOLARIS ) || defined ( NETBSD ) ) && defined ( SPARC ) +#error please use asm/interlck_sparc.s +#elif defined ( SOLARIS) && defined ( X86 ) +#error please use asm/interlck_x86.s +#elif defined ( GCC ) && ( defined ( X86 ) || defined ( X86_64 ) ) +/* That's possible on x86-64 too since oslInterlockedCount is a sal_Int32 */ + +extern int osl_isSingleCPU; + +/*****************************************************************************/ +/* osl_incrementInterlockedCount */ +/*****************************************************************************/ +oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) +{ + register oslInterlockedCount nCount asm("%eax"); + + nCount = 1; + + if ( osl_isSingleCPU ) { + __asm__ __volatile__ ( + "xaddl %0, %1\n\t" + : "+r" (nCount), "+m" (*pCount) + : /* nothing */ + : "memory"); + } + else { + __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; + + if ( osl_isSingleCPU ) { + __asm__ __volatile__ ( + "xaddl %0, %1\n\t" + : "+r" (nCount), "+m" (*pCount) + : /* nothing */ + : "memory"); + } + else { + __asm__ __volatile__ ( + "lock\n\t" + "xaddl %0, %1\n\t" + : "+r" (nCount), "+m" (*pCount) + : /* nothing */ + : "memory"); + } + + return --nCount; +} + +#elif defined ( GCC ) && defined ( POWERPC ) && !defined( AIX ) + +/*****************************************************************************/ +/* osl_incrementInterlockedCount */ +/*****************************************************************************/ +oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) +{ + /* "addi" doesn't work with r0 as second parameter */ + register oslInterlockedCount nCount __asm__ ("r4"); + + __asm__ __volatile__ ( + "1: lwarx %0,0,%2\n\t" + " addi %0,%0,1\n\t" + " stwcx. %0,0,%2\n\t" + " bne- 1b\n\t" + " isync" + : "=&r" (nCount), "=m" (*pCount) + : "r" (pCount) + : "memory"); + + return nCount; +} + +oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount) +{ + /* "subi" doesn't work with r0 as second parameter */ + register oslInterlockedCount nCount __asm__ ("r4"); + + __asm__ __volatile__ ( + "1: lwarx %0,0,%2\n\t" + " subi %0,%0,1\n\t" + " stwcx. %0,0,%2\n\t" + " bne- 1b\n\t" + " isync" + : "=&r" (nCount), "=m" (*pCount) + : "r" (pCount) + : "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; + +/*****************************************************************************/ +/* osl_incrementInterlockedCount */ +/*****************************************************************************/ +oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) +{ + oslInterlockedCount Count; + + pthread_mutex_lock(&InterLock); + Count = ++(*pCount); + pthread_mutex_unlock(&InterLock); + + return (Count); +} + +/*****************************************************************************/ +/* osl_decrementInterlockedCount */ +/*****************************************************************************/ +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: */ |