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RocksDB for Erlang
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deps/rocksdb/util/hash_containers.h
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
// This header establishes compile-time pluggable implementations of hashed
// container structures, so that deployments have the option of minimal
// dependencies with ok performance (e.g. std::unordered_map) or more
// dependencies with optimized performance (e.g. folly::F14FastMap).
#pragma once
#include "rocksdb/rocksdb_namespace.h"
#ifdef USE_FOLLY
#include <folly/container/F14Map.h>
#include <folly/container/F14Set.h>
namespace ROCKSDB_NAMESPACE {
template <typename K, typename V>
using UnorderedMap = folly::F14FastMap<K, V>;
template <typename K, typename V, typename H>
using UnorderedMapH = folly::F14FastMap<K, V, H>;
template <typename K>
using UnorderedSet = folly::F14FastSet<K>;
} // namespace ROCKSDB_NAMESPACE
#else
#include <unordered_map>
#include <unordered_set>
namespace ROCKSDB_NAMESPACE {
template <typename K, typename V>
using UnorderedMap = std::unordered_map<K, V>;
template <typename K, typename V, typename H>
using UnorderedMapH = std::unordered_map<K, V, H>;
template <typename K>
using UnorderedSet = std::unordered_set<K>;
} // namespace ROCKSDB_NAMESPACE
#endif