1*404b540aSrobert // Low-level functions for atomic operations: version for CPUs providing
2*404b540aSrobert // atomic builtins -*- C++ -*-
3*404b540aSrobert
4*404b540aSrobert // Copyright (C) 2006 Free Software Foundation, Inc.
5*404b540aSrobert //
6*404b540aSrobert // This file is part of the GNU ISO C++ Library. This library is free
7*404b540aSrobert // software; you can redistribute it and/or modify it under the
8*404b540aSrobert // terms of the GNU General Public License as published by the
9*404b540aSrobert // Free Software Foundation; either version 2, or (at your option)
10*404b540aSrobert // any later version.
11*404b540aSrobert
12*404b540aSrobert // This library is distributed in the hope that it will be useful,
13*404b540aSrobert // but WITHOUT ANY WARRANTY; without even the implied warranty of
14*404b540aSrobert // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15*404b540aSrobert // GNU General Public License for more details.
16*404b540aSrobert
17*404b540aSrobert // You should have received a copy of the GNU General Public License along
18*404b540aSrobert // with this library; see the file COPYING. If not, write to the Free
19*404b540aSrobert // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
20*404b540aSrobert // USA.
21*404b540aSrobert
22*404b540aSrobert // As a special exception, you may use this file as part of a free software
23*404b540aSrobert // library without restriction. Specifically, if other files instantiate
24*404b540aSrobert // templates or use macros or inline functions from this file, or you compile
25*404b540aSrobert // this file and link it with other files to produce an executable, this
26*404b540aSrobert // file does not by itself cause the resulting executable to be covered by
27*404b540aSrobert // the GNU General Public License. This exception does not however
28*404b540aSrobert // invalidate any other reasons why the executable file might be covered by
29*404b540aSrobert // the GNU General Public License.
30*404b540aSrobert
31*404b540aSrobert /** @file ext/atomicity.h
32*404b540aSrobert * This file is a GNU extension to the Standard C++ Library.
33*404b540aSrobert */
34*404b540aSrobert
35*404b540aSrobert #include <bits/c++config.h>
36*404b540aSrobert #include <bits/atomic_word.h>
37*404b540aSrobert
_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)38*404b540aSrobert _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
39*404b540aSrobert
40*404b540aSrobert _Atomic_word
41*404b540aSrobert __attribute__ ((__unused__))
42*404b540aSrobert __exchange_and_add(volatile _Atomic_word* __mem, int __val)
43*404b540aSrobert { return __sync_fetch_and_add(__mem, __val); }
44*404b540aSrobert
45*404b540aSrobert void
46*404b540aSrobert __attribute__ ((__unused__))
__atomic_add(volatile _Atomic_word * __mem,int __val)47*404b540aSrobert __atomic_add(volatile _Atomic_word* __mem, int __val)
48*404b540aSrobert { __sync_fetch_and_add(__mem, __val); }
49*404b540aSrobert
50*404b540aSrobert _GLIBCXX_END_NAMESPACE
51