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 orientation.
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
11#define IPC_MESSAGE_START DeviceOrientationMsgStart
12
13// Asks the browser process to activate Device Orientation sensors if necessary.
14IPC_MESSAGE_CONTROL0(DeviceOrientationHostMsg_StartPolling)
15
16// The browser process asynchronously returns the shared memory handle that will
17// hold the data from the hardware sensors.
18// See device_orientation_hardware_buffer.h for a description of how
19// synchronization is handled.
20IPC_MESSAGE_CONTROL1(DeviceOrientationMsg_DidStartPolling,
21                     base::SharedMemoryHandle /* handle */)
22
23// Notifies the browser process that the renderer process is not using the
24// Device Orientation data anymore. The number of Starts should match the
25// number of Stops.
26IPC_MESSAGE_CONTROL0(DeviceOrientationHostMsg_StopPolling)
27