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 35 namespace 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. 40 class WebGamepads { 41 public: WebGamepads()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 55 COMPILE_ASSERT(sizeof(WebGamepads) == 2888, WebGamepads_has_wrong_size); 56 #endif 57 58 #pragma pack(pop) 59 60 } 61 62 #endif // WebGamepads_h 63