1// Copyright (C) 2011, Google Inc. All rights reserved. 2// 3// Redistribution and use in source and binary forms, with or without 4// modification, are permitted provided that the following conditions are met: 5// 6// 1. Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// 2. Redistributions in binary form must reproduce the above copyright 9// notice, this list of conditions and the following disclaimer in the 10// documentation and/or other materials provided with the distribution. 11// 12// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND 13// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15// ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE 16// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 18// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 19// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 22// DAMAGE. 23 24#ifndef WebGamepads_h 25#define WebGamepads_h 26 27#include "WebGamepad.h" 28 29#if BLINK_IMPLEMENTATION 30#include "wtf/Assertions.h" 31#endif 32 33#pragma pack(push, 1) 34 35namespace blink { 36 37// This structure is intentionally POD and fixed size so that it can be stored 38// in shared memory between hardware polling threads and the rest of the 39// browser. 40class WebGamepads { 41public: 42 WebGamepads() 43 : length(0) { } 44 45 static const size_t itemsLengthCap = 4; 46 47 // Number of valid entries in the items array. 48 unsigned length; 49 50 // Gamepad data for N separate gamepad devices. 51 WebGamepad items[itemsLengthCap]; 52}; 53 54#if BLINK_IMPLEMENTATION 55COMPILE_ASSERT(sizeof(WebGamepads) == 2888, WebGamepads_has_wrong_size); 56#endif 57 58#pragma pack(pop) 59 60} 61 62#endif // WebGamepads_h 63