1 #pragma once 2 /* 3 * Copyright (C) 2017 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #include "common/vsoc/shm/base.h" 19 #include "common/vsoc/shm/circqueue.h" 20 21 // Memory layout for region carrying input events from host to guest 22 23 namespace vsoc { 24 namespace layout { 25 26 namespace input_events { 27 28 struct InputEventsLayout : public RegionLayout { 29 static constexpr size_t layout_size = 30 CircularPacketQueue<10, 256>::layout_size + 31 2 * CircularPacketQueue<10, 16>::layout_size; 32 33 static const char* region_name; 34 // Event queues for the different input devices supported. Both the power 35 // button and the keyboard need only generate 2 input events for every 36 // 'hardware' event, so 16 bytes are enough, however when the touchscreen has 37 // multitouch enabled the number of generated events is significantly higher. 38 CircularPacketQueue<10, 256> touch_screen_queue; 39 CircularPacketQueue<10, 16> keyboard_queue; 40 CircularPacketQueue<10, 16> power_button_queue; 41 }; 42 ASSERT_SHM_COMPATIBLE(InputEventsLayout); 43 44 } // namespace input_events 45 } // namespace layout 46 } // namespace vsoc 47