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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "net/disk_cache/blockfile/mapped_file.h" | 5 #include "net/disk_cache/blockfile/mapped_file.h" |
6 | 6 |
7 #include <algorithm> | |
8 | |
9 #include "base/memory/scoped_ptr.h" | |
10 | |
7 namespace disk_cache { | 11 namespace disk_cache { |
8 | 12 |
9 // Note: Most of this class is implemented in platform-specific files. | 13 // Note: Most of this class is implemented in platform-specific files. |
10 | 14 |
11 bool MappedFile::Load(const FileBlock* block) { | 15 bool MappedFile::Load(const FileBlock* block) { |
12 size_t offset = block->offset() + view_size_; | 16 size_t offset = block->offset() + view_size_; |
13 return Read(block->buffer(), block->size(), offset); | 17 return Read(block->buffer(), block->size(), offset); |
14 } | 18 } |
15 | 19 |
16 bool MappedFile::Store(const FileBlock* block) { | 20 bool MappedFile::Store(const FileBlock* block) { |
17 size_t offset = block->offset() + view_size_; | 21 size_t offset = block->offset() + view_size_; |
18 return Write(block->buffer(), block->size(), offset); | 22 return Write(block->buffer(), block->size(), offset); |
19 } | 23 } |
20 | 24 |
21 bool MappedFile::Load(const FileBlock* block, | 25 bool MappedFile::Load(const FileBlock* block, |
22 FileIOCallback* callback, | 26 FileIOCallback* callback, |
23 bool* completed) { | 27 bool* completed) { |
24 size_t offset = block->offset() + view_size_; | 28 size_t offset = block->offset() + view_size_; |
25 return Read(block->buffer(), block->size(), offset, callback, completed); | 29 return Read(block->buffer(), block->size(), offset, callback, completed); |
26 } | 30 } |
27 | 31 |
28 bool MappedFile::Store(const FileBlock* block, | 32 bool MappedFile::Store(const FileBlock* block, |
29 FileIOCallback* callback, | 33 FileIOCallback* callback, |
30 bool* completed) { | 34 bool* completed) { |
31 size_t offset = block->offset() + view_size_; | 35 size_t offset = block->offset() + view_size_; |
32 return Write(block->buffer(), block->size(), offset, callback, completed); | 36 return Write(block->buffer(), block->size(), offset, callback, completed); |
33 } | 37 } |
34 | 38 |
39 bool MappedFile::Preload() { | |
40 static const size_t kPreloadBufferSize = 16384; | |
rvargas (doing something else)
2014/03/20 19:05:19
The files have a limited size... the index is at m
| |
41 size_t file_len = GetLength(); | |
42 size_t left_to_read = file_len; | |
43 scoped_ptr<char[]> buf(new char[kPreloadBufferSize]); | |
44 while (left_to_read > 0) { | |
45 size_t to_read = std::min(kPreloadBufferSize, left_to_read); | |
46 size_t offset = file_len - left_to_read; | |
47 if (!Read(buf.get(), to_read, offset)) { | |
48 return false; | |
49 } | |
50 left_to_read -= to_read; | |
51 } | |
52 return true; | |
53 } | |
35 } // namespace disk_cache | 54 } // namespace disk_cache |
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