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