58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
#pragma once
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#include "sds.h"
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class StorageCache
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{
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std::shared_ptr<IStorage> m_spstorage;
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dict *m_pdict = nullptr;
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int m_collisionCount = 0;
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mutable fastlock m_lock {"StorageCache"};
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std::atomic<int> bulkInsertsInProgress;
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StorageCache(IStorage *storage, bool fNoCache);
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void cacheKey(sds key);
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void cacheKey(const char *rgchKey, size_t cchKey);
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struct load_iter_data
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{
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StorageCache *cache;
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IStorageFactory::key_load_iterator itrParent;
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void *privdataParent;
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};
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static void key_load_itr(const char *rgchKey, size_t cchKey, void *privdata)
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{
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load_iter_data *data = (load_iter_data*)privdata;
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data->cache->cacheKey(rgchKey, cchKey);
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if (data->itrParent)
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data->itrParent(rgchKey, cchKey, data->privdataParent);
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}
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public:
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~StorageCache();
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static StorageCache *create(IStorageFactory *pfactory, int db, IStorageFactory::key_load_iterator fn, void *privdata) {
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StorageCache *cache = new StorageCache(nullptr, pfactory->FSlow() /*fCache*/);
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load_iter_data data = {cache, fn, privdata};
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cache->m_spstorage = std::shared_ptr<IStorage>(pfactory->create(db, key_load_itr, (void*)&data));
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return cache;
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}
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void clear();
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void insert(sds key, const void *data, size_t cbdata, bool fOverwrite);
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void bulkInsert(sds *rgkeys, sds *rgvals, size_t celem);
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void retrieve(sds key, IStorage::callbackSingle fn) const;
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bool erase(sds key);
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bool enumerate(IStorage::callback fn) const { return m_spstorage->enumerate(fn); }
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void beginWriteBatch();
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void endWriteBatch() { m_spstorage->endWriteBatch(); }
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void batch_lock() { return m_spstorage->batch_lock(); }
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void batch_unlock() { return m_spstorage->batch_unlock(); }
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size_t count() const;
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const StorageCache *clone();
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};
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