1// 2// Copyright (C) 2015 The Android Open Source Project 3// 4// Licensed under the Apache License, Version 2.0 (the "License"); 5// you may not use this file except in compliance with the License. 6// You may obtain a copy of the License at 7// 8// http://www.apache.org/licenses/LICENSE-2.0 9// 10// Unless required by applicable law or agreed to in writing, software 11// distributed under the License is distributed on an "AS IS" BASIS, 12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13// See the License for the specific language governing permissions and 14// limitations under the License. 15// 16 17#ifndef UPDATE_ENGINE_COMMON_BOOT_CONTROL_STUB_H_ 18#define UPDATE_ENGINE_COMMON_BOOT_CONTROL_STUB_H_ 19 20#include <string> 21 22#include "update_engine/common/boot_control_interface.h" 23 24namespace chromeos_update_engine { 25 26// An implementation of the BootControlInterface that does nothing, 27// typically used when e.g. an underlying HAL implementation cannot be 28// loaded or doesn't exist. 29// 30// You are gauranteed that the implementation of GetNumSlots() method 31// always returns 0. This can be used to identify that this 32// implementation is in use. 33class BootControlStub : public BootControlInterface { 34 public: 35 BootControlStub() = default; 36 ~BootControlStub() = default; 37 38 // BootControlInterface overrides. 39 unsigned int GetNumSlots() const override; 40 BootControlInterface::Slot GetCurrentSlot() const override; 41 bool GetPartitionDevice(const std::string& partition_name, 42 BootControlInterface::Slot slot, 43 std::string* device) const override; 44 bool IsSlotBootable(BootControlInterface::Slot slot) const override; 45 bool MarkSlotUnbootable(BootControlInterface::Slot slot) override; 46 bool SetActiveBootSlot(BootControlInterface::Slot slot) override; 47 bool MarkBootSuccessfulAsync(base::Callback<void(bool)> callback) override; 48 49 private: 50 DISALLOW_COPY_AND_ASSIGN(BootControlStub); 51}; 52 53} // namespace chromeos_update_engine 54 55#endif // UPDATE_ENGINE_COMMON_BOOT_CONTROL_STUB_H_ 56