1 //
2 // Copyright (C) 2014 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 UPDATE_ENGINE_UPDATE_MANAGER_REAL_RANDOM_PROVIDER_H_
18 #define UPDATE_ENGINE_UPDATE_MANAGER_REAL_RANDOM_PROVIDER_H_
19 
20 #include <memory>
21 
22 #include "update_engine/update_manager/random_provider.h"
23 
24 namespace chromeos_update_manager {
25 
26 // RandomProvider implementation class.
27 class RealRandomProvider : public RandomProvider {
28  public:
29   RealRandomProvider() {}
30 
31   Variable<uint64_t>* var_seed() override { return var_seed_.get(); }
32 
33   // Initializes the provider and returns whether it succeeded.
34   bool Init();
35 
36  private:
37   // The seed() scoped variable.
38   std::unique_ptr<Variable<uint64_t>> var_seed_;
39 
40   DISALLOW_COPY_AND_ASSIGN(RealRandomProvider);
41 };
42 
43 }  // namespace chromeos_update_manager
44 
45 #endif  // UPDATE_ENGINE_UPDATE_MANAGER_REAL_RANDOM_PROVIDER_H_
46