1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// IPC messages for device motion.
6// Multiply-included message file, hence no include guard.
7
8#include "base/memory/shared_memory.h"
9#include "ipc/ipc_message_macros.h"
10#include "ipc/ipc_param_traits.h"
11#include "ipc/ipc_platform_file.h"
12
13#define IPC_MESSAGE_START DeviceMotionMsgStart
14
15// Asks the browser process to activate Device Motion sensors if necessary.
16IPC_MESSAGE_CONTROL0(DeviceMotionHostMsg_StartPolling)
17
18// The browser process asynchronously returns the shared memory handle that will
19// hold the data from the hardware sensors.
20// See device_motion_hardware_buffer.h for a description of how
21// synchronization is handled.
22IPC_MESSAGE_CONTROL1(DeviceMotionMsg_DidStartPolling,
23                     base::SharedMemoryHandle /* handle */)
24
25// Notifies the browser process that the renderer process is not using the
26// Device Motion data anymore. The number of Starts should match the number
27// of Stops.
28IPC_MESSAGE_CONTROL0(DeviceMotionHostMsg_StopPolling)
29