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 24 namespace 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. 33 class 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
