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// Copyright (C) 2012 The Android Open Source Project
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
class MetricsLibraryInterface;
namespace chromeos_update_manager {
class UpdateManager;
} // namespace chromeos_update_manager
namespace policy {
class DevicePolicy;
} // namespace policy
namespace chromeos_update_engine {
// SystemState is the root class within the update engine. So we should avoid
// any circular references in header file inclusion. Hence forward-declaring
// the required classes.
class BootControlInterface;
class ClockInterface;
class ConnectionManagerInterface;
class HardwareInterface;
class OmahaRequestParams;
class P2PManager;
class PayloadStateInterface;
class PowerManagerInterface;
class PrefsInterface;
class UpdateAttempter;
// An interface to global system context, including platform resources,
// the current state of the system, high-level objects whose lifetime is same
// as main, system interfaces, etc.
// Carved out separately so it can be mocked for unit tests.
// Currently it has only one method, but we should start migrating other
// methods to use this as and when needed to unit test them.
// TODO(jaysri): Consider renaming this to something like GlobalContext.
class SystemState {
// Destructs this object.
virtual ~SystemState() {}
// Sets or gets the latest device policy.
virtual void set_device_policy(const policy::DevicePolicy* device_policy) = 0;
virtual const policy::DevicePolicy* device_policy() = 0;
// Gets the interface object for the bootloader control interface.
virtual BootControlInterface* boot_control() = 0;
// Gets the interface object for the clock.
virtual ClockInterface* clock() = 0;
// Gets the connection manager object.
virtual ConnectionManagerInterface* connection_manager() = 0;
// Gets the hardware interface object.
virtual HardwareInterface* hardware() = 0;
// Gets the Metrics Library interface for reporting UMA stats.
virtual MetricsLibraryInterface* metrics_lib() = 0;
// Gets the interface object for persisted store.
virtual PrefsInterface* prefs() = 0;
// Gets the interface object for the persisted store that persists across
// powerwashes. Please note that this should be used very seldomly and must
// be forwards and backwards compatible as powerwash is used to go back and
// forth in system versions.
virtual PrefsInterface* powerwash_safe_prefs() = 0;
// Gets the interface for the payload state object.
virtual PayloadStateInterface* payload_state() = 0;
// Returns a pointer to the update attempter object.
virtual UpdateAttempter* update_attempter() = 0;
// Returns a pointer to the object that stores the parameters that are
// common to all Omaha requests.
virtual OmahaRequestParams* request_params() = 0;
// Returns a pointer to the P2PManager singleton.
virtual P2PManager* p2p_manager() = 0;
// Returns a pointer to the UpdateManager singleton.
virtual chromeos_update_manager::UpdateManager* update_manager() = 0;
// Gets the power manager object. Mocked during test.
virtual PowerManagerInterface* power_manager() = 0;
// If true, this is the first instance of the update engine since the system
// restarted. Important for tracking whether you are running instance of the
// update engine on first boot or due to a crash/restart.
virtual bool system_rebooted() = 0;
} // namespace chromeos_update_engine