1 /* 2 ** Copyright 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_FILE_BLOB_CACHE_H 18 #define ANDROID_FILE_BLOB_CACHE_H 19 20 #include "BlobCache.h" 21 #include <string> 22 23 namespace android { 24 25 uint32_t crc32c(const uint8_t* buf, size_t len); 26 27 class FileBlobCache : public BlobCache { 28 public: 29 // FileBlobCache attempts to load the saved cache contents from disk into 30 // BlobCache. 31 FileBlobCache(size_t maxKeySize, size_t maxValueSize, size_t maxTotalSize, 32 const std::string& filename); 33 34 // writeToFile attempts to save the current contents of BlobCache to 35 // disk. 36 void writeToFile(); 37 38 // Return the total size of the cache 39 size_t getSize(); 40 41 private: 42 // mFilename is the name of the file for storing cache contents. 43 std::string mFilename; 44 }; 45 46 } // namespace android 47 48 #endif // ANDROID_BLOB_CACHE_H 49