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- // Copyright 2019 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef BASE_ALLOCATOR_PARTITION_ALLOCATOR_RANDOM_H_
- #define BASE_ALLOCATOR_PARTITION_ALLOCATOR_RANDOM_H_
- #include <stdint.h>
- #include "base/allocator/partition_allocator/partition_alloc_base/component_export.h"
- namespace partition_alloc {
- namespace internal {
- // Returns a random value. The generator's internal state is initialized with
- // `base::RandUint64` which is very unpredictable, but which is expensive due to
- // the need to call into the kernel. Therefore this generator uses a fast,
- // entirely user-space function after initialization.
- PA_COMPONENT_EXPORT(PARTITION_ALLOC) uint32_t RandomValue();
- } // namespace internal
- // Sets the seed for the random number generator to a known value, to cause the
- // RNG to generate a predictable sequence of outputs. May be called multiple
- // times.
- PA_COMPONENT_EXPORT(PARTITION_ALLOC) void SetMmapSeedForTesting(uint64_t seed);
- } // namespace partition_alloc
- #endif // BASE_ALLOCATOR_PARTITION_ALLOCATOR_RANDOM_H_
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