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- // Copyright 2014 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 COMPONENTS_METRICS_MACHINE_ID_PROVIDER_H_
- #define COMPONENTS_METRICS_MACHINE_ID_PROVIDER_H_
- #include <string>
- namespace metrics {
- // Provides machine characteristics used as a machine id. The implementation is
- // platform specific. GetMachineId() must be called on a thread which allows
- // I/O. GetMachineId() must not be called if HasId() returns false on this
- // platform.
- class MachineIdProvider {
- public:
- MachineIdProvider() = delete;
- MachineIdProvider(const MachineIdProvider&) = delete;
- MachineIdProvider& operator=(const MachineIdProvider&) = delete;
- // Returns true if this platform provides a non-empty GetMachineId(). This is
- // useful to avoid an async call to GetMachineId() on platforms with no
- // implementation.
- static bool HasId();
- // Get a string containing machine characteristics, to be used as a machine
- // id. The implementation is split into Windows and non-Windows. The former
- // returns the drive serial number and the latter returns the hardware
- // model name. Should not be called if HasId() returns false.
- // The return value should not be stored to disk or transmitted.
- static std::string GetMachineId();
- };
- } // namespace metrics
- #endif // COMPONENTS_METRICS_MACHINE_ID_PROVIDER_H_
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