1 files changed, 84 insertions, 0 deletions
diff --git a/meshmc/launcher/RWStorage.h b/meshmc/launcher/RWStorage.h
new file mode 100644
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+++ b/meshmc/launcher/RWStorage.h
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+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program 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.
+ *
+ *   This program 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 program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include <QWriteLocker>
+#include <QReadLocker>
+#include <QMap>
+#include <QSet>
+
+template <typename K, typename V> class RWStorage
+{
+  public:
+	void add(K key, V value)
+	{
+		QWriteLocker l(&lock);
+		cache[key] = value;
+		stale_entries.remove(key);
+	}
+	V get(K key)
+	{
+		QReadLocker l(&lock);
+		if (cache.contains(key)) {
+			return cache[key];
+		} else
+			return V();
+	}
+	bool get(K key, V& value)
+	{
+		QReadLocker l(&lock);
+		if (cache.contains(key)) {
+			value = cache[key];
+			return true;
+		} else
+			return false;
+	}
+	bool has(K key)
+	{
+		QReadLocker l(&lock);
+		return cache.contains(key);
+	}
+	bool stale(K key)
+	{
+		QReadLocker l(&lock);
+		if (!cache.contains(key))
+			return true;
+		return stale_entries.contains(key);
+	}
+	void setStale(K key)
+	{
+		QWriteLocker l(&lock);
+		if (cache.contains(key)) {
+			stale_entries.insert(key);
+		}
+	}
+	void clear()
+	{
+		QWriteLocker l(&lock);
+		cache.clear();
+		stale_entries.clear();
+	}
+
+  private:
+	QReadWriteLock lock;
+	QMap<K, V> cache;
+	QSet<K> stale_entries;
+};