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Diffstat (limited to 'src/syncedsettings.h')
-rw-r--r-- | src/syncedsettings.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/syncedsettings.h b/src/syncedsettings.h new file mode 100644 index 0000000..f83847c --- /dev/null +++ b/src/syncedsettings.h @@ -0,0 +1,112 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * syncedsettings.h + * + * Thu Mar 31 09:23:27 CEST 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 Lesser 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser 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 <mutex> + +// type trait helper + +template <typename T, typename... Types> +struct pack_contains; + +template <typename T, typename... Types> +struct pack_contains<T, T, Types...> + : std::true_type { +}; + +template <typename T, typename Head, typename... Types> +struct pack_contains<T, Head, Types...> + : pack_contains<T, Types...> { +}; + +template <typename T> +struct pack_contains<T> + : std::false_type { +}; + +// -------------------------------------------------------------------- + +template <typename T> +class Group; + +template <typename T> +class Accessor { + private: + std::lock_guard<std::mutex> lock; + + public: + Accessor(Group<T>& parent) + : lock{parent.mutex} + , data{parent.data} { + } + + T& data; +}; + +template <typename T> +class Group { + private: + friend class Accessor<T>; + + mutable std::mutex mutex; + T data; + + public: + Group() + : mutex{} + , data{} { + } + + Group(T const & data) + : mutex{} + , data{data} { + } + + Group(T&& data) + : mutex{} + , data{std::move(data)} { + } + + Group(Group<T> const & other) + : mutex{} + , data{} { + std::lock_guard<std::mutex> lock{other.mutex}; + data = other.data; + } + + Group(Group<T>&& other) + : mutex{} + , data{} { + std::lock_guard<std::mutex> lock{other.mutex}; + std::swap(data, other.data); + } + + operator T() const { + std::lock_guard<std::mutex> lock{mutex}; + return data; + } +}; |