content/common/device_sensors/device_orientation_messages.h

   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.
  14 IPC_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.
  20 IPC_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.
  26 IPC_MESSAGE_CONTROL0(DeviceOrientationHostMsg_StopPolling)