OLD | NEW |
---|---|
1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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/mapped_file.h" | 5 #include "net/disk_cache/mapped_file.h" |
6 | 6 |
7 #include <errno.h> | 7 #include <errno.h> |
8 #include <sys/mman.h> | 8 #include <sys/mman.h> |
9 | 9 |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "net/disk_cache/disk_cache.h" | 11 #include "net/disk_cache/disk_cache.h" |
12 | 12 |
13 namespace disk_cache { | 13 namespace disk_cache { |
14 | 14 |
15 void* MappedFile::Init(const std::wstring& name, size_t size) { | 15 void* MappedFile::Init(const std::wstring& name, size_t size) { |
16 DCHECK(!init_); | 16 DCHECK(!init_); |
17 if (init_ || !File::Init(name)) | 17 if (init_ || !File::Init(name)) |
18 return NULL; | 18 return NULL; |
19 | 19 |
20 if (!size) | 20 if (!size) |
21 size = GetLength(); | 21 size = GetLength(); |
22 | 22 |
23 buffer_ = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, | 23 buffer_ = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, |
24 platform_file(), 0); | 24 platform_file(), 0); |
25 init_ = true; | 25 init_ = true; |
26 DCHECK(reinterpret_cast<int>(buffer_) != -1); | 26 DCHECK(reinterpret_cast<intptr_t>(buffer_) != -1); |
Evan Martin
2009/07/28 21:15:29
how about comparing to MAP_FAILED?
| |
27 if (reinterpret_cast<int>(buffer_) == -1) | 27 if (reinterpret_cast<intptr_t>(buffer_) == -1) |
28 buffer_ = 0; | 28 buffer_ = 0; |
29 | 29 |
30 view_size_ = size; | 30 view_size_ = size; |
31 return buffer_; | 31 return buffer_; |
32 } | 32 } |
33 | 33 |
34 MappedFile::~MappedFile() { | 34 MappedFile::~MappedFile() { |
35 if (!init_) | 35 if (!init_) |
36 return; | 36 return; |
37 | 37 |
38 if (buffer_) { | 38 if (buffer_) { |
39 int ret = munmap(buffer_, view_size_); | 39 int ret = munmap(buffer_, view_size_); |
40 DCHECK(0 == ret); | 40 DCHECK(0 == ret); |
41 } | 41 } |
42 } | 42 } |
43 | 43 |
44 bool MappedFile::Load(const FileBlock* block) { | 44 bool MappedFile::Load(const FileBlock* block) { |
45 size_t offset = block->offset() + view_size_; | 45 size_t offset = block->offset() + view_size_; |
46 return Read(block->buffer(), block->size(), offset); | 46 return Read(block->buffer(), block->size(), offset); |
47 } | 47 } |
48 | 48 |
49 bool MappedFile::Store(const FileBlock* block) { | 49 bool MappedFile::Store(const FileBlock* block) { |
50 size_t offset = block->offset() + view_size_; | 50 size_t offset = block->offset() + view_size_; |
51 return Write(block->buffer(), block->size(), offset); | 51 return Write(block->buffer(), block->size(), offset); |
52 } | 52 } |
53 | 53 |
54 } // namespace disk_cache | 54 } // namespace disk_cache |
OLD | NEW |