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
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