1*38fd1498Szrj // Low-level functions for atomic operations: version for CPUs providing
2*38fd1498Szrj // atomic builtins -*- C++ -*-
3*38fd1498Szrj
4*38fd1498Szrj // Copyright (C) 2006-2018 Free Software Foundation, Inc.
5*38fd1498Szrj //
6*38fd1498Szrj // This file is part of the GNU ISO C++ Library. This library is free
7*38fd1498Szrj // software; you can redistribute it and/or modify it under the
8*38fd1498Szrj // terms of the GNU General Public License as published by the
9*38fd1498Szrj // Free Software Foundation; either version 3, or (at your option)
10*38fd1498Szrj // any later version.
11*38fd1498Szrj
12*38fd1498Szrj // This library is distributed in the hope that it will be useful,
13*38fd1498Szrj // but WITHOUT ANY WARRANTY; without even the implied warranty of
14*38fd1498Szrj // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15*38fd1498Szrj // GNU General Public License for more details.
16*38fd1498Szrj
17*38fd1498Szrj // Under Section 7 of GPL version 3, you are granted additional
18*38fd1498Szrj // permissions described in the GCC Runtime Library Exception, version
19*38fd1498Szrj // 3.1, as published by the Free Software Foundation.
20*38fd1498Szrj
21*38fd1498Szrj // You should have received a copy of the GNU General Public License and
22*38fd1498Szrj // a copy of the GCC Runtime Library Exception along with this program;
23*38fd1498Szrj // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24*38fd1498Szrj // <http://www.gnu.org/licenses/>.
25*38fd1498Szrj
26*38fd1498Szrj #include <bits/c++config.h>
27*38fd1498Szrj #include <bits/atomic_word.h>
28*38fd1498Szrj
_GLIBCXX_VISIBILITY(default)29*38fd1498Szrj namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
30*38fd1498Szrj {
31*38fd1498Szrj _GLIBCXX_BEGIN_NAMESPACE_VERSION
32*38fd1498Szrj
33*38fd1498Szrj _Atomic_word
34*38fd1498Szrj __attribute__ ((__unused__))
35*38fd1498Szrj __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
36*38fd1498Szrj { return __atomic_fetch_add(__mem, __val, __ATOMIC_ACQ_REL); }
37*38fd1498Szrj
38*38fd1498Szrj void
39*38fd1498Szrj __attribute__ ((__unused__))
40*38fd1498Szrj __atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
41*38fd1498Szrj { __atomic_fetch_add(__mem, __val, __ATOMIC_ACQ_REL); }
42*38fd1498Szrj
43*38fd1498Szrj _GLIBCXX_END_NAMESPACE_VERSION
44*38fd1498Szrj } // namespace
45