SystemInfo.cpp (2417B)
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 <windows.h> 27 #include "common/platform.h" 28 29 #if _WIN32_WINNT_WINBLUE 30 # include <versionhelpers.h> 31 #endif 32 33 namespace rx 34 { 35 36 #ifndef _WIN32_WINNT_WINBLUE 37 static bool IsWindowsVistaOrGreater() 38 { 39 OSVERSIONINFOEXW osvi = {}; 40 osvi.dwOSVersionInfoSize = sizeof(osvi); 41 osvi.dwMajorVersion = HIBYTE(_WIN32_WINNT_VISTA); 42 osvi.dwMinorVersion = LOBYTE(_WIN32_WINNT_VISTA); 43 DWORDLONG condition = 0; 44 VER_SET_CONDITION(condition, VER_MAJORVERSION, VER_GREATER_EQUAL); 45 VER_SET_CONDITION(condition, VER_MINORVERSION, VER_GREATER_EQUAL); 46 return !!::VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION, condition); 47 } 48 #endif 49 50 bool isWindowsVistaOrGreater() 51 { 52 static bool initialized = false; 53 static bool cachedIsWindowsVistaOrGreater; 54 55 if (!initialized) 56 { 57 initialized = true; 58 #if defined(ANGLE_ENABLE_WINDOWS_STORE) 59 cachedIsWindowsVistaOrGreater = true; 60 #else 61 cachedIsWindowsVistaOrGreater = IsWindowsVistaOrGreater(); 62 #endif 63 } 64 return cachedIsWindowsVistaOrGreater; 65 } 66 67 } // namespace rx