A key value store. With locking. Can't go any simpler than that.

kv.cpp

template <typename K, typename V>
class RWStorage
{
public:
	void add(K key, V value)
	{
		QWriteLocker l(&lock);
		cache[key] = value;
	}
	V get(K key) const
	{
		QReadLocker l(&lock);
		if(cache.contains(key))
		{
			return cache[key];
		}
		else return V();
	}
	void clear()
	{
		QWriteLocker l(&lock);
		cache.clear();
	}
private:
	QReadWriteLock lock;
	QMap<K, V> cache;
};