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// Copyright 2017 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ABSL_RANDOM_INTERNAL_RANDEN_HWAES_H_
#define ABSL_RANDOM_INTERNAL_RANDEN_HWAES_H_
// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
// symbols from arbitrary system and other headers, since it may be built
// with different flags from other targets, using different levels of
// optimization, potentially introducing ODR violations.
namespace absl {
namespace random_internal {
// RANDen = RANDom generator or beetroots in Swiss German.
// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
//
// RandenHwAes implements the basic state manipulation methods.
class RandenHwAes {
public:
static void Generate(const void* keys, void* state_void);
static void Absorb(const void* seed_void, void* state_void);
static const void* GetKeys();
};
// HasRandenHwAesImplementation returns true when there is an accelerated
// implementation, and false otherwise. If there is no implementation,
// then attempting to use it will abort the program.
bool HasRandenHwAesImplementation();
} // namespace random_internal
} // namespace absl
#endif // ABSL_RANDOM_INTERNAL_RANDEN_FAST_H_
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