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