// Copyright 2020 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.

module arc.mojom;

enum AttributeIOResult {
  SUCCESS = 0,
  ERROR_CHANNEL_NOT_FOUND = 1,
  ERROR_ATTRIBUTE_NOT_FOUND = 2,
  ERROR_IO = 3,
};

// SensorService provides access to all sensor devices.
interface SensorService {
  // Returns the list of device names.
  GetDeviceNames@0() => (array<string> names);

  // Binds the request to the specified device.
  GetDeviceByName@1(string name, SensorDevice& request);
};

// SensorDevice provides an interface to interact with a sensor device.
interface SensorDevice {
  // Returns the value of the specified device attribute.
  GetAttribute@0(string name) => (AttributeIOResult result, string value);

  // Sets the specified device attribute.
  SetAttribute@1(string name, string value) => (AttributeIOResult result);

  // Opens the device buffer.
  OpenBuffer@2() => (handle? fd);
};