1 /* 2 * Copyright (C) 2009 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "platform/win/SystemInfo.h" 28 29 #if _WIN32_WINNT_WINBLUE 30 #include <versionhelpers.h> 31 #endif 32 33 #include <windows.h> 34 35 namespace blink { 36 37 #ifndef _WIN32_WINNT_WINBLUE 38 static bool IsWindowsVistaOrGreater() 39 { 40 OSVERSIONINFOEXW osvi = { }; 41 osvi.dwOSVersionInfoSize = sizeof(osvi); 42 osvi.dwMajorVersion = HIBYTE(_WIN32_WINNT_VISTA); 43 osvi.dwMinorVersion = LOBYTE(_WIN32_WINNT_VISTA); 44 DWORDLONG conditoin = 0; 45 VER_SET_CONDITION(conditoin, VER_MAJORVERSION, VER_GREATER_EQUAL); 46 VER_SET_CONDITION(conditoin, VER_MINORVERSION, VER_GREATER_EQUAL); 47 return !!::VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION, conditoin); 48 } 49 #endif 50 51 bool isWindowsVistaOrGreater() 52 { 53 static bool initialized = false; 54 static bool cachedIsWindowsVistaOrGreater; 55 56 if (!initialized) { 57 initialized = true; 58 cachedIsWindowsVistaOrGreater = IsWindowsVistaOrGreater(); 59 } 60 return cachedIsWindowsVistaOrGreater; 61 } 62 63 } // namespace blink 64
