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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 "webkit/common/blob/shareable_file_reference.h" | 5 #include "webkit/common/blob/shareable_file_reference.h" |
6 | 6 |
7 #include <map> | 7 #include <map> |
8 | 8 |
9 #include "base/lazy_instance.h" | 9 #include "base/lazy_instance.h" |
10 #include "base/message_loop/message_loop_proxy.h" | 10 #include "base/message_loop/message_loop_proxy.h" |
11 #include "base/task_runner.h" | 11 #include "base/task_runner.h" |
12 #include "base/threading/non_thread_safe.h" | 12 #include "base/threading/non_thread_safe.h" |
13 | 13 |
14 namespace webkit_blob { | 14 namespace storage { |
15 | 15 |
16 namespace { | 16 namespace { |
17 | 17 |
18 // A shareable file map with enforcement of thread checker. | 18 // A shareable file map with enforcement of thread checker. |
19 class ShareableFileMap : public base::NonThreadSafe { | 19 class ShareableFileMap : public base::NonThreadSafe { |
20 public: | 20 public: |
21 typedef std::map<base::FilePath, ShareableFileReference*> FileMap; | 21 typedef std::map<base::FilePath, ShareableFileReference*> FileMap; |
22 typedef FileMap::iterator iterator; | 22 typedef FileMap::iterator iterator; |
23 typedef FileMap::key_type key_type; | 23 typedef FileMap::key_type key_type; |
24 typedef FileMap::value_type value_type; | 24 typedef FileMap::value_type value_type; |
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78 } | 78 } |
79 | 79 |
80 // static | 80 // static |
81 scoped_refptr<ShareableFileReference> ShareableFileReference::GetOrCreate( | 81 scoped_refptr<ShareableFileReference> ShareableFileReference::GetOrCreate( |
82 ScopedFile scoped_file) { | 82 ScopedFile scoped_file) { |
83 if (scoped_file.path().empty()) | 83 if (scoped_file.path().empty()) |
84 return scoped_refptr<ShareableFileReference>(); | 84 return scoped_refptr<ShareableFileReference>(); |
85 | 85 |
86 typedef std::pair<ShareableFileMap::iterator, bool> InsertResult; | 86 typedef std::pair<ShareableFileMap::iterator, bool> InsertResult; |
87 // Required for VS2010: http://connect.microsoft.com/VisualStudio/feedback/det
ails/520043/error-converting-from-null-to-a-pointer-type-in-std-pair | 87 // Required for VS2010: http://connect.microsoft.com/VisualStudio/feedback/det
ails/520043/error-converting-from-null-to-a-pointer-type-in-std-pair |
88 webkit_blob::ShareableFileReference* null_reference = NULL; | 88 storage::ShareableFileReference* null_reference = NULL; |
89 InsertResult result = g_file_map.Get().Insert( | 89 InsertResult result = g_file_map.Get().Insert( |
90 ShareableFileMap::value_type(scoped_file.path(), null_reference)); | 90 ShareableFileMap::value_type(scoped_file.path(), null_reference)); |
91 if (result.second == false) { | 91 if (result.second == false) { |
92 scoped_file.Release(); | 92 scoped_file.Release(); |
93 return scoped_refptr<ShareableFileReference>(result.first->second); | 93 return scoped_refptr<ShareableFileReference>(result.first->second); |
94 } | 94 } |
95 | 95 |
96 // Wasn't in the map, create a new reference and store the pointer. | 96 // Wasn't in the map, create a new reference and store the pointer. |
97 scoped_refptr<ShareableFileReference> reference( | 97 scoped_refptr<ShareableFileReference> reference( |
98 new ShareableFileReference(scoped_file.Pass())); | 98 new ShareableFileReference(scoped_file.Pass())); |
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109 ShareableFileReference::ShareableFileReference(ScopedFile scoped_file) | 109 ShareableFileReference::ShareableFileReference(ScopedFile scoped_file) |
110 : scoped_file_(scoped_file.Pass()) { | 110 : scoped_file_(scoped_file.Pass()) { |
111 DCHECK(g_file_map.Get().Find(path())->second == NULL); | 111 DCHECK(g_file_map.Get().Find(path())->second == NULL); |
112 } | 112 } |
113 | 113 |
114 ShareableFileReference::~ShareableFileReference() { | 114 ShareableFileReference::~ShareableFileReference() { |
115 DCHECK(g_file_map.Get().Find(path())->second == this); | 115 DCHECK(g_file_map.Get().Find(path())->second == this); |
116 g_file_map.Get().Erase(path()); | 116 g_file_map.Get().Erase(path()); |
117 } | 117 } |
118 | 118 |
119 } // namespace webkit_blob | 119 } // namespace storage |
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