1 /* 2 * Copyright (C) 2017 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 ANDROID_INSTALLD_CACHE_TRACKER_H 18 #define ANDROID_INSTALLD_CACHE_TRACKER_H 19 20 #include <memory> 21 #include <string> 22 #include <queue> 23 24 #include <sys/types.h> 25 #include <sys/stat.h> 26 27 #include <android-base/macros.h> 28 #include <cutils/multiuser.h> 29 30 #include "CacheItem.h" 31 32 namespace android { 33 namespace installd { 34 35 /** 36 * Cache tracker for a single UID. Each tracker is used in two modes: first 37 * for loading lightweight "stats", and then by loading detailed "items" 38 * which can then be purged to free up space. 39 */ 40 class CacheTracker { 41 public: 42 CacheTracker(userid_t userId, appid_t appId, const std::string& uuid); 43 ~CacheTracker(); 44 45 std::string toString(); 46 47 void addDataPath(const std::string& dataPath); 48 49 void loadStats(); 50 void loadItems(); 51 52 void ensureItems(); 53 54 int getCacheRatio(); 55 56 int64_t cacheUsed; 57 int64_t cacheQuota; 58 59 std::vector<std::shared_ptr<CacheItem>> items; 60 61 private: 62 userid_t mUserId; 63 appid_t mAppId; 64 bool mItemsLoaded; 65 const std::string& mUuid; 66 67 std::vector<std::string> mDataPaths; 68 69 bool loadQuotaStats(); 70 void loadItemsFrom(const std::string& path); 71 72 DISALLOW_COPY_AND_ASSIGN(CacheTracker); 73 }; 74 75 } // namespace installd 76 } // namespace android 77 78 #endif // ANDROID_INSTALLD_CACHE_TRACKER_H 79
