1// Low-level functions for atomic operations: sh version  -*- C++ -*-
2
3// Copyright (C) 1999-2020 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.
24
25// Use the default atomicity stuff, which will use __atomic* builtins
26// if threads are available, or the *_single functions on single-thread
27// configurations.
28// Actually we wouldn't need this header at all, but because of PR 53579
29// libstdc++'s configury will not pickup the -matomic-model= option when
30// set in the environment.  This makes it impossible to enable the proper
31// atomic model on SH without modifying GCC itself, because libstdc++ always
32// thinks the target doesn't do any atomics and uses the default mutex based
33// implementation from cpu/generic/atomicity_mutex.
34
35#include <ext/atomicity.h>
36