From fcdef40659077e56256cff4f3bd8b9d9520ad087 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20Gl=C3=B6ckner?= Date: Wed, 23 Mar 2016 22:40:27 +0100 Subject: atomic workaround --- src/atomic.h | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 src/atomic.h (limited to 'src') diff --git a/src/atomic.h b/src/atomic.h new file mode 100644 index 0000000..11c87fc --- /dev/null +++ b/src/atomic.h @@ -0,0 +1,105 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * atomic.h + * + * Wed Mar 23 09:15:05 CET 2016 + * Copyright 2016 Christian Glöckner + * cgloeckner@freenet.de + ****************************************************************************/ + +/* + * This file is part of DrumGizmo. + * + * DrumGizmo 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 3 of the License, or + * (at your option) any later version. + * + * DrumGizmo 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 DrumGizmo; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#pragma once + +#include +#include +#include + +template +class Atomic; + +// use std::atomic if possible +template +class Atomic::value>::type> + : public std::atomic { +}; + +// else work around it using a mutex +template +class Atomic::value>::type> { + public: + using self_type = Atomic::value>::type>; + + Atomic() + : data{} + , mutex{} { + } + + Atomic(T data) + : data{std::move(data)} + , mutex{} { + } + + Atomic(self_type const & other) + : data{} + , mutex{} { + std::lock_guard lock{other.mutex}; + data = other.data; + } + + Atomic(self_type&& other) + : data{} + , mutex{} { + std::lock_guard lock{other.mutex}; + std::swap(data, other.data); + } + + T operator=(T data) { + std::lock_guard lock{mutex}; + this->data = std::move(data); + return this->data; + } + + operator T() const { + return load(); + } + + bool is_lock_free() const { + return false; + } + + void store(T data) { + std::lock_guard lock{mutex}; + this->data = std::move(data); + } + + T load() const { + std::lock_guard lock{mutex}; + return data; + } + + T exchange(T data){ + std::lock_guard lock{mutex}; + std::swap(data, this->data); + return data; + } + + private: + T data; + mutable std::mutex mutex; +}; -- cgit v1.2.3