CacheTracker.h revision d712f0ccc120357e1267a04ac6de9dd732b27e76
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 32namespace android { 33namespace 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 */ 40class CacheTracker { 41public: 42 CacheTracker(userid_t userId, appid_t appId, const std::string& quotaDevice); 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 61private: 62 userid_t mUserId; 63 appid_t mAppId; 64 std::string mQuotaDevice; 65 bool mItemsLoaded; 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