1 /* 2 * Copyright (C) 2013 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_LIBELFFILE_STREAM_BUFFERED_OUTPUT_STREAM_H_ 18 #define ART_LIBELFFILE_STREAM_BUFFERED_OUTPUT_STREAM_H_ 19 20 #include <memory> 21 22 #include "output_stream.h" 23 24 #include "base/globals.h" 25 26 namespace art { 27 28 class BufferedOutputStream final : public OutputStream { 29 public: 30 explicit BufferedOutputStream(std::unique_ptr<OutputStream> out); 31 32 ~BufferedOutputStream() override; 33 34 bool WriteFully(const void* buffer, size_t byte_count) override; 35 36 off_t Seek(off_t offset, Whence whence) override; 37 38 bool Flush() override; 39 40 private: 41 static const size_t kBufferSize = 8 * KB; 42 43 bool FlushBuffer(); 44 45 std::unique_ptr<OutputStream> const out_; 46 uint8_t buffer_[kBufferSize]; 47 size_t used_; 48 49 DISALLOW_COPY_AND_ASSIGN(BufferedOutputStream); 50 }; 51 52 } // namespace art 53 54 #endif // ART_LIBELFFILE_STREAM_BUFFERED_OUTPUT_STREAM_H_ 55