1132720Skan// Low-level type for atomic operations -*- C++ -*- 2132720Skan 3132720Skan// Copyright (C) 2004 Free Software Foundation, Inc. 4132720Skan// 5132720Skan// This file is part of the GNU ISO C++ Library. This library is free 6132720Skan// software; you can redistribute it and/or modify it under the 7132720Skan// terms of the GNU General Public License as published by the 8132720Skan// Free Software Foundation; either version 2, or (at your option) 9132720Skan// any later version. 10132720Skan 11132720Skan// This library is distributed in the hope that it will be useful, 12132720Skan// but WITHOUT ANY WARRANTY; without even the implied warranty of 13132720Skan// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14132720Skan// GNU General Public License for more details. 15132720Skan 16132720Skan// You should have received a copy of the GNU General Public License along 17132720Skan// with this library; see the file COPYING. If not, write to the Free 18169691Skan// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19132720Skan// USA. 20132720Skan 21132720Skan// As a special exception, you may use this file as part of a free software 22132720Skan// library without restriction. Specifically, if other files instantiate 23132720Skan// templates or use macros or inline functions from this file, or you compile 24132720Skan// this file and link it with other files to produce an executable, this 25132720Skan// file does not by itself cause the resulting executable to be covered by 26132720Skan// the GNU General Public License. This exception does not however 27132720Skan// invalidate any other reasons why the executable file might be covered by 28132720Skan// the GNU General Public License. 29132720Skan 30132720Skan#ifndef _GLIBCXX_ATOMIC_WORD_H 31132720Skan#define _GLIBCXX_ATOMIC_WORD_H 1 32132720Skan 33132720Skan#ifdef __arch64__ 34132720Skan typedef long _Atomic_word; 35132720Skan#else 36132720Skan typedef int _Atomic_word; 37132720Skan#endif 38132720Skan 39169691Skan#if defined(__sparc_v9__) 40169691Skan// These are necessary under the V9 RMO model, though it is almost never 41169691Skan// used in userspace. 42169691Skan#define _GLIBCXX_READ_MEM_BARRIER \ 43169691Skan __asm __volatile ("membar #LoadLoad":::"memory") 44169691Skan#define _GLIBCXX_WRITE_MEM_BARRIER \ 45169691Skan __asm __volatile ("membar #StoreStore":::"memory") 46169691Skan 47169691Skan#elif defined(__sparc_v8__) 48169691Skan// This is necessary under the PSO model. 49169691Skan#define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("stbar":::"memory") 50169691Skan 51169691Skan#endif 52169691Skan 53132720Skan#endif 54