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base / test / scoped_amount_of_physical_memory_override.h [blame]
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TEST_SCOPED_AMOUNT_OF_PHYSICAL_MEMORY_OVERRIDE_H_
#define BASE_TEST_SCOPED_AMOUNT_OF_PHYSICAL_MEMORY_OVERRIDE_H_
#include <stdint.h>
#include <optional>
namespace base::test {
// Sets the amount of physical memory in MB override on construction, and
// removes it when the object goes out of scope. This class is intended to be
// used by tests that need to override the amount of physical memory on the
// system to validate different system conditions.
class ScopedAmountOfPhysicalMemoryOverride {
public:
// Constructor that initializes the amount of memory override. Memory is
// specified in MB.
explicit ScopedAmountOfPhysicalMemoryOverride(uint64_t amount_of_memory_mb);
ScopedAmountOfPhysicalMemoryOverride(
const ScopedAmountOfPhysicalMemoryOverride&) = delete;
ScopedAmountOfPhysicalMemoryOverride& operator=(
const ScopedAmountOfPhysicalMemoryOverride&) = delete;
~ScopedAmountOfPhysicalMemoryOverride();
private:
std::optional<uint64_t> old_amount_of_physical_memory_mb_;
};
} // namespace base::test
#endif // BASE_TEST_SCOPED_AMOUNT_OF_PHYSICAL_MEMORY_OVERRIDE_H_