1 /*
2  * Copyright (C) 2017 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 #include "include/random_generator.h"
18 
19 namespace wifi_offload_test {
20 namespace {
21 /* use default seed (vs. random seed) to reproduce the same sequence on
22  * different runs */
23 constexpr bool kUseDefaultSeed = true;
24 }  // namespace
25 
RandomGenerator()26 RandomGenerator::RandomGenerator() {
27   if (kUseDefaultSeed) {
28     initial_seed_ = random_engine_.default_seed;
29   } else {
30     /* Used to obtain a seed for the random number engine */
31     std::random_device random_device;
32     // save the seed for future resets
33     initial_seed_ = random_device();
34   }
35 
36   Reset();
37 }
38 
Reset()39 void RandomGenerator::Reset() {
40   random_engine_.seed(initial_seed_);
41   uniform_distribution_.reset();
42 }
43 
44 }  // namespace wifi_offload_test
45