64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
#pragma once
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#include <QMap>
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#include <QReadLocker>
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#include <QSet>
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#include <QWriteLocker>
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template <typename K, typename V>
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class RWStorage {
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public:
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void add(K key, V value)
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{
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QWriteLocker l(&lock);
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cache[key] = value;
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stale_entries.remove(key);
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}
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V get(K key)
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{
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QReadLocker l(&lock);
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if (cache.contains(key)) {
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return cache[key];
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} else
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return V();
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}
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bool get(K key, V& value)
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{
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QReadLocker l(&lock);
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if (cache.contains(key)) {
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value = cache[key];
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return true;
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} else
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return false;
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}
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bool has(K key)
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{
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QReadLocker l(&lock);
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return cache.contains(key);
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}
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bool stale(K key)
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{
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QReadLocker l(&lock);
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if (!cache.contains(key))
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return true;
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return stale_entries.contains(key);
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}
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void setStale(K key)
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{
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QWriteLocker l(&lock);
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if (cache.contains(key)) {
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stale_entries.insert(key);
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}
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}
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void clear()
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{
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QWriteLocker l(&lock);
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cache.clear();
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stale_entries.clear();
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}
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private:
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QReadWriteLock lock;
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QMap<K, V> cache;
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QSet<K> stale_entries;
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};
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