-#ifdef MC_PAGE_STORE_MD4
- typedef boost::array<uint64_t,2> hash_type;
-#else
- typedef uint64_t hash_type;
-#endif
-private: // Types
-#ifdef MC_PAGE_STORE_MD4
- // We are using a secure hash to identify a page.
- // We assume there will not be any collision: we need to map a hash
- // to a single page index.
- typedef boost::unordered_map<hash_type, size_t> pages_map_type;
-#else