1169691Skan// Low-level functions for atomic operations: version for CPUs providing 2169691Skan// atomic builtins -*- C++ -*- 3169691Skan 4169691Skan// Copyright (C) 2006 Free Software Foundation, Inc. 5169691Skan// 6169691Skan// This file is part of the GNU ISO C++ Library. This library is free 7169691Skan// software; you can redistribute it and/or modify it under the 8169691Skan// terms of the GNU General Public License as published by the 9169691Skan// Free Software Foundation; either version 2, or (at your option) 10169691Skan// any later version. 11169691Skan 12169691Skan// This library is distributed in the hope that it will be useful, 13169691Skan// but WITHOUT ANY WARRANTY; without even the implied warranty of 14169691Skan// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15169691Skan// GNU General Public License for more details. 16169691Skan 17169691Skan// You should have received a copy of the GNU General Public License along 18169691Skan// with this library; see the file COPYING. If not, write to the Free 19169691Skan// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 20169691Skan// USA. 21169691Skan 22169691Skan// As a special exception, you may use this file as part of a free software 23169691Skan// library without restriction. Specifically, if other files instantiate 24169691Skan// templates or use macros or inline functions from this file, or you compile 25169691Skan// this file and link it with other files to produce an executable, this 26169691Skan// file does not by itself cause the resulting executable to be covered by 27169691Skan// the GNU General Public License. This exception does not however 28169691Skan// invalidate any other reasons why the executable file might be covered by 29169691Skan// the GNU General Public License. 30169691Skan 31169691Skan/** @file ext/atomicity.h 32169691Skan * This file is a GNU extension to the Standard C++ Library. 33169691Skan */ 34169691Skan 35169691Skan#include <bits/c++config.h> 36169691Skan#include <bits/atomic_word.h> 37169691Skan 38169691Skan_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) 39169691Skan 40169691Skan _Atomic_word 41169691Skan __attribute__ ((__unused__)) 42169691Skan __exchange_and_add(volatile _Atomic_word* __mem, int __val) 43169691Skan { return __sync_fetch_and_add(__mem, __val); } 44169691Skan 45169691Skan void 46169691Skan __attribute__ ((__unused__)) 47169691Skan __atomic_add(volatile _Atomic_word* __mem, int __val) 48169691Skan { __sync_fetch_and_add(__mem, __val); } 49169691Skan 50169691Skan_GLIBCXX_END_NAMESPACE 51