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
IsWindowsVistaOrGreater()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
isWindowsVistaOrGreater()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
68