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Implementation of copy-insert of LRU cache

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DennisOSRM 2012-06-12 13:25:38 +02:00
parent 8ddb3fc6ad
commit fa62f70cdf
1 changed files with 10 additions and 0 deletions
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10
DataStructures/LRUCache.h
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@ -53,6 +53,16 @@ public:
itemsInCache.pop_back(); itemsInCache.pop_back();
} }
} }
void Insert(const KeyT key, ValueT value) {
itemsInCache.push_front(CacheEntry(key, value));
positionMap.insert(std::make_pair(key, itemsInCache.begin()));
if(itemsInCache.size() > capacity) {
positionMap.erase(itemsInCache.back().key);
itemsInCache.pop_back();
}
}
bool Fetch(const KeyT key, ValueT& result) { bool Fetch(const KeyT key, ValueT& result) {
if(Holds(key)) { if(Holds(key)) {
CacheEntry e = *(positionMap.find(key)->second); CacheEntry e = *(positionMap.find(key)->second);