From a2be5f0c15218b0177d73b17d9bcb7589965d685 Mon Sep 17 00:00:00 2001 From: peter Date: Sun, 1 Jun 2008 00:03:21 +0000 Subject: Reorganize the gcc vendor import work area. This flattens out a bunch of unnecessary path components that are relics of cvs2svn. (These are directory moves) --- .../config/cpu/generic/atomicity_mutex/atomicity.h | 61 ++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 libstdc++/config/cpu/generic/atomicity_mutex/atomicity.h (limited to 'libstdc++/config/cpu/generic/atomicity_mutex') diff --git a/libstdc++/config/cpu/generic/atomicity_mutex/atomicity.h b/libstdc++/config/cpu/generic/atomicity_mutex/atomicity.h new file mode 100644 index 0000000..e9ee10c --- /dev/null +++ b/libstdc++/config/cpu/generic/atomicity_mutex/atomicity.h @@ -0,0 +1,61 @@ +// Low-level functions for atomic operations: Generic version -*- C++ -*- + +// Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005, 2006 +// Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +/** @file ext/atomicity.h + * This file is a GNU extension to the Standard C++ Library. + */ + +#include +#include + +namespace +{ + __gnu_cxx::__mutex atomic_mutex; +} // anonymous namespace + +_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) + + _Atomic_word + __attribute__ ((__unused__)) + __exchange_and_add(volatile _Atomic_word* __mem, int __val) + { + __gnu_cxx::__scoped_lock sentry(atomic_mutex); + _Atomic_word __result; + __result = *__mem; + *__mem += __val; + return __result; + } + + void + __attribute__ ((__unused__)) + __atomic_add(volatile _Atomic_word* __mem, int __val) + { __exchange_and_add(__mem, __val); } + +_GLIBCXX_END_NAMESPACE -- cgit v1.1