atomicity.h revision 169691
188242Sjkh// Low-level functions for atomic operations: version for CPUs providing 288242Sjkh// atomic builtins -*- C++ -*- 388242Sjkh 488242Sjkh// Copyright (C) 2006 Free Software Foundation, Inc. 5276486Sngie// 688242Sjkh// This file is part of the GNU ISO C++ Library. This library is free 788242Sjkh// software; you can redistribute it and/or modify it under the 8// terms of the GNU General Public License as published by the 9// Free Software Foundation; either version 2, or (at your option) 10// any later version. 11 12// This library is distributed in the hope that it will be useful, 13// but WITHOUT ANY WARRANTY; without even the implied warranty of 14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15// GNU General Public License for more details. 16 17// You should have received a copy of the GNU General Public License along 18// with this library; see the file COPYING. If not, write to the Free 19// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 20// USA. 21 22// As a special exception, you may use this file as part of a free software 23// library without restriction. Specifically, if other files instantiate 24// templates or use macros or inline functions from this file, or you compile 25// this file and link it with other files to produce an executable, this 26// file does not by itself cause the resulting executable to be covered by 27// the GNU General Public License. This exception does not however 28// invalidate any other reasons why the executable file might be covered by 29// the GNU General Public License. 30 31/** @file ext/atomicity.h 32 * This file is a GNU extension to the Standard C++ Library. 33 */ 34 35#include <bits/c++config.h> 36#include <bits/atomic_word.h> 37 38_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) 39 40 _Atomic_word 41 __attribute__ ((__unused__)) 42 __exchange_and_add(volatile _Atomic_word* __mem, int __val) 43 { return __sync_fetch_and_add(__mem, __val); } 44 45 void 46 __attribute__ ((__unused__)) 47 __atomic_add(volatile _Atomic_word* __mem, int __val) 48 { __sync_fetch_and_add(__mem, __val); } 49 50_GLIBCXX_END_NAMESPACE 51