seed_sequences.cc (1094B)
1 // Copyright 2017 The Abseil Authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "absl/random/seed_sequences.h" 16 17 #include <iterator> 18 19 #include "absl/base/config.h" 20 #include "absl/random/internal/entropy_pool.h" 21 22 namespace absl { 23 ABSL_NAMESPACE_BEGIN 24 25 SeedSeq MakeSeedSeq() { 26 SeedSeq::result_type seed_material[8]; 27 random_internal::GetEntropyFromRandenPool(&seed_material[0], 28 sizeof(seed_material[0]) * 8); 29 return SeedSeq(std::begin(seed_material), std::end(seed_material)); 30 } 31 32 ABSL_NAMESPACE_END 33 } // namespace absl