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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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 #ifndef COMPONENTS_SYNC_MODEL_IMPL_MODEL_TYPE_STORE_BACKEND_H_ | 5 #ifndef COMPONENTS_SYNC_MODEL_IMPL_MODEL_TYPE_STORE_BACKEND_H_ |
6 #define COMPONENTS_SYNC_MODEL_IMPL_MODEL_TYPE_STORE_BACKEND_H_ | 6 #define COMPONENTS_SYNC_MODEL_IMPL_MODEL_TYPE_STORE_BACKEND_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 #include <string> | 9 #include <string> |
10 #include <unordered_map> | 10 #include <unordered_map> |
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21 } // namespace leveldb | 21 } // namespace leveldb |
22 | 22 |
23 namespace syncer { | 23 namespace syncer { |
24 | 24 |
25 // ModelTypeStoreBackend handles operations with leveldb. It is oblivious of the | 25 // ModelTypeStoreBackend handles operations with leveldb. It is oblivious of the |
26 // fact that it is called from separate thread (with the exception of ctor), | 26 // fact that it is called from separate thread (with the exception of ctor), |
27 // meaning it shouldn't deal with callbacks and task_runners. | 27 // meaning it shouldn't deal with callbacks and task_runners. |
28 class ModelTypeStoreBackend | 28 class ModelTypeStoreBackend |
29 : public base::RefCountedThreadSafe<ModelTypeStoreBackend> { | 29 : public base::RefCountedThreadSafe<ModelTypeStoreBackend> { |
30 public: | 30 public: |
31 typedef std::unordered_map<std::string, ModelTypeStoreBackend*> BackendMap; | 31 using BackendMap = std::unordered_map<std::string, ModelTypeStoreBackend*>; |
32 | 32 |
33 // Helper function to create in memory environment for leveldb. | 33 // Helper function to create in memory environment for leveldb. |
34 static std::unique_ptr<leveldb::Env> CreateInMemoryEnv(); | 34 static std::unique_ptr<leveldb::Env> CreateInMemoryEnv(); |
35 | 35 |
36 // GetOrCreateBackend will check if |backend_map_| has a backend with same | 36 // GetOrCreateBackend will check if |backend_map_| has a backend with same |
37 // |path|. If |backend_map_| has one, wrap that backend to scoped_refptr and | 37 // |path|. If |backend_map_| has one, wrap that backend to scoped_refptr and |
38 // return. If |backend_map_| does not have, create a backend and store it into | 38 // return. If |backend_map_| does not have, create a backend and store it into |
39 // |backend_map_|. | 39 // |backend_map_|. |
40 static scoped_refptr<ModelTypeStoreBackend> GetOrCreateBackend( | 40 static scoped_refptr<ModelTypeStoreBackend> GetOrCreateBackend( |
41 const std::string& path, | 41 const std::string& path, |
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116 | 116 |
117 // Macro wrapped mutex to guard against concurrent calls in debug builds. | 117 // Macro wrapped mutex to guard against concurrent calls in debug builds. |
118 DFAKE_MUTEX(push_pop_); | 118 DFAKE_MUTEX(push_pop_); |
119 | 119 |
120 DISALLOW_COPY_AND_ASSIGN(ModelTypeStoreBackend); | 120 DISALLOW_COPY_AND_ASSIGN(ModelTypeStoreBackend); |
121 }; | 121 }; |
122 | 122 |
123 } // namespace syncer | 123 } // namespace syncer |
124 | 124 |
125 #endif // COMPONENTS_SYNC_MODEL_IMPL_MODEL_TYPE_STORE_BACKEND_H_ | 125 #endif // COMPONENTS_SYNC_MODEL_IMPL_MODEL_TYPE_STORE_BACKEND_H_ |
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