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_COMPILER_LINKER_BUFFERED_OUTPUT_STREAM_H_
18 #define ART_COMPILER_LINKER_BUFFERED_OUTPUT_STREAM_H_
19 
20 #include <memory>
21 
22 #include "output_stream.h"
23 
24 #include "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_COMPILER_LINKER_BUFFERED_OUTPUT_STREAM_H_
55