content/common/device_sensors/device_light_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 light.
   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 DeviceLightMsgStart
  14
  15 // Asks the browser process to activate Device Light sensors if necessary.
  16 IPC_MESSAGE_CONTROL0(DeviceLightHostMsg_StartPolling)
  17
  18 // The browser process asynchronously returns the shared memory handle that
  19 // will hold the data from the hardware sensors.
  20 IPC_MESSAGE_CONTROL1(DeviceLightMsg_DidStartPolling,
  21                      base::SharedMemoryHandle /* handle */)
  22
  23 // Notifies the browser process that the renderer process is not using the
  24 // Device Light data anymore. The number of Starts should match the number
  25 // of Stops.
  26 IPC_MESSAGE_CONTROL0(DeviceLightHostMsg_StopPolling)