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authorBent Bisballe Nyeng <deva@aasimon.org>2016-04-16 13:33:53 +0200
committerBent Bisballe Nyeng <deva@aasimon.org>2016-04-16 13:33:53 +0200
commit4eb252df04ab237c8638d45bcbf028859dc6a110 (patch)
tree8bffddf62b4271336a6e0121fef8133327654000 /src/syncedsettings.h
parentef68248bf70a027595803b08433a7a2c74e20fd0 (diff)
parent35e804b984c28131fe13d229c5a0867762c6e8cf (diff)
Merge branch 'settings'
Diffstat (limited to 'src/syncedsettings.h')
-rw-r--r--src/syncedsettings.h106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/syncedsettings.h b/src/syncedsettings.h
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+++ b/src/syncedsettings.h
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+/* -*- 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>
+
+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(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);
+ }
+
+ Group<T>& operator=(const Group<T>& other)
+ {
+ if (*this != &other)
+ {
+ std::lock_guard<std::mutex> lock{mutex};
+ std::lock_guard<std::mutex> lock2{other.mutex};
+ data = other.data;
+ }
+ return *this;
+ }
+
+ Group<T>& operator=(Group<T>&& other)
+ {
+ if (*this != &other)
+ {
+ std::lock_guard<std::mutex> lock{mutex};
+ std::lock_guard<std::mutex> lock2{other.mutex};
+ std::swap(data, other.data);
+ }
+ return *this;
+ }
+
+ operator T() const
+ {
+ std::lock_guard<std::mutex> lock{mutex};
+ return data;
+ }
+};