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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_COMPONENTS_SENSORS_ASH_SENSOR_HAL_DISPATCHER_H_
#define CHROMEOS_COMPONENTS_SENSORS_ASH_SENSOR_HAL_DISPATCHER_H_
#include "base/component_export.h"
#include "base/sequence_checker.h"
#include "chromeos/ash/components/mojo_service_manager/mojom/mojo_service_manager.mojom.h"
#include "chromeos/components/sensors/mojom/cros_sensor_service.mojom.h"
#include "chromeos/components/sensors/mojom/sensor.mojom.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/bindings/remote_set.h"
namespace chromeos {
namespace sensors {
// SensorHalDispatcher is a dispatcher that receives registrations of Sensor
// Service, including the server (IIO Service) and clients (e.g. powerd,
// simpleclient and Chrome's components). It'll then establish mojo channels
// between the server and clients.
// SensorHalDispatcher should be only used on the UI thread.
class COMPONENT_EXPORT(CHROMEOS_SENSORS) SensorHalDispatcher
: public mojo_service_manager::mojom::ServiceObserver {
public:
// Creates the global SensorHalDispatcher instance.
static void Initialize();
// Destroys the global SensorHalDispatcher instance if it exists.
static void Shutdown();
// Returns a pointer to the global SensorHalDispatcher instance.
// Initialize() should already have been called.
static SensorHalDispatcher* GetInstance();
// Register IIO Service's mojo remote to this dispatcher.
void RegisterServer(mojo::PendingRemote<mojom::SensorHalServer> remote);
// Register a sensor client's mojo remote to this dispatcher.
void RegisterClient(mojo::PendingRemote<mojom::SensorHalClient> remote);
// Query IioSensor service via Mojo Service Manager to establish mojo
// channels between iioservice and sensor clients.
// Should only be called once after CrOS Mojo Service Manager is connected.
void TryToEstablishMojoChannelByServiceManager();
// mojo_service_manager::mojom::ServiceObserver overrides:
void OnServiceEvent(
mojo_service_manager::mojom::ServiceEventPtr event) override;
private:
SensorHalDispatcher();
~SensorHalDispatcher() override;
void QueryCallback(
mojo_service_manager::mojom::ErrorOrServiceStatePtr result);
void OnIioSensorServiceRegistered();
void EstablishMojoChannel(const mojo::Remote<mojom::SensorHalClient>& client);
void OnSensorHalServerDisconnect();
void OnSensorHalClientDisconnect(mojo::RemoteSetElementId id);
mojo::Remote<mojom::SensorHalServer> sensor_hal_server_;
mojo::RemoteSet<mojom::SensorHalClient> sensor_hal_clients_;
mojo::Receiver<mojo_service_manager::mojom::ServiceObserver> receiver_;
bool iio_sensor_available_ = false;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace sensors
} // namespace chromeos
#endif // CHROMEOS_COMPONENTS_SENSORS_ASH_SENSOR_HAL_DISPATCHER_H_
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