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48 lines
1002 B
C++
48 lines
1002 B
C++
#ifndef __NCPP_INTERNAL_HELPERS_HH
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#define __NCPP_INTERNAL_HELPERS_HH
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#include <functional>
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#include <map>
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#include <mutex>
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namespace ncpp::internal
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{
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class Helpers
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{
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public:
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template<typename TKey, typename TValue>
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static TValue lookup_map_entry (std::map<TKey,TValue> *&_map, std::mutex &_mutex, TKey _key, std::function<TValue (TKey)> create_value)
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{
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std::lock_guard<std::mutex> lock (_mutex);
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if (_map == nullptr) {
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_map = new std::map<TKey,TValue> ();
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}
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TValue ret;
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auto entry = _map->find (_key);
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if (entry == _map->end ()) {
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ret = create_value (_key);
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} else {
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ret = entry->second;
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}
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return ret;
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}
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template<typename TKey, typename TValue>
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static void remove_map_entry (std::map<TKey,TValue> *&_map, std::mutex &_mutex, TKey _key)
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{
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std::lock_guard<std::mutex> lock (_mutex);
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if (_map == nullptr)
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return;
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auto entry = _map->find (_key);
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if (entry == _map->end ())
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return;
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_map->erase (entry);
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}
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};
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}
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#endif
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