40 lines
786 B
C++
40 lines
786 B
C++
#ifndef MAPCACHE_H
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#define MAPCACHE_H
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#include <map>
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#include <set>
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#include <shared_mutex>
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#include <optional>
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#include <string>
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/* Thread-Safe Key-Value store */
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template <class T> class MapCache
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{
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private:
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std::map<std::string, T> cache;
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mutable std::shared_mutex sharedMutex;
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public:
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std::optional<T> find(const std::string &key) const
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{
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std::shared_lock<std::shared_mutex> lock(this->sharedMutex);
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auto it = this->cache.find(key);
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if(it != this->cache.end())
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{
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return it->second;
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}
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return {};
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}
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void set(const std::string &key, const T &val)
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{
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std::lock_guard<std::shared_mutex> lock{sharedMutex};
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this->cache[key] = val;
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}
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void clear()
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{
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std::lock_guard<std::shared_mutex> lock{sharedMutex};
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this->cache.clear();
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}
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};
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#endif // MAPCACHE_H
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