|
|
|
|
// 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_
|
|
|
|
|
|
|
|
|
|
#include "absl/base/config.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 {
|
|
|
|
|
ABSL_NAMESPACE_BEGIN
|
|
|
|
|
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
|
|
|
|
|
ABSL_NAMESPACE_END
|
|
|
|
|
} // namespace absl
|
|
|
|
|
|
|
|
|
|
#endif // ABSL_RANDOM_INTERNAL_RANDEN_HWAES_H_
|
