1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_BASE_HASH_MAP_H_ 18 #define ART_RUNTIME_BASE_HASH_MAP_H_ 19 20 #include <utility> 21 22 #include "hash_set.h" 23 24 namespace art { 25 26 template <typename Fn> 27 class HashMapWrapper { 28 public: 29 // Hash function. 30 template <class Key, class Value> 31 size_t operator()(const std::pair<Key, Value>& pair) const { 32 return fn_(pair.first); 33 } 34 template <class Key> 35 size_t operator()(const Key& key) const { 36 return fn_(key); 37 } 38 template <class Key, class Value> 39 bool operator()(const std::pair<Key, Value>& a, const std::pair<Key, Value>& b) const { 40 return fn_(a.first, b.first); 41 } 42 template <class Key, class Value, class Element> 43 bool operator()(const std::pair<Key, Value>& a, const Element& element) const { 44 return fn_(a.first, element); 45 } 46 47 private: 48 Fn fn_; 49 }; 50 51 template <class Key, class Value, class EmptyFn = DefaultEmptyFn<Key>, 52 class HashFn = std::hash<Key>, class Pred = std::equal_to<Key>, 53 class Alloc = std::allocator<std::pair<Key, Value>>> 54 class HashMap : public HashSet<std::pair<Key, Value>, EmptyFn, HashMapWrapper<HashFn>, 55 HashMapWrapper<Pred>, Alloc> { 56 }; 57 58 } // namespace art 59 60 #endif // ART_RUNTIME_BASE_HASH_MAP_H_ 61
