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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef WINDOWS_VERSION_HEADER_238470348254325
#define WINDOWS_VERSION_HEADER_238470348254325
#include <utility>
#include "win.h" //includes "windows.h"
namespace zen
{
struct OsVersion
{
OsVersion() : major(), minor() {}
OsVersion(DWORD high, DWORD low) : major(high), minor(low) {}
DWORD major;
DWORD minor;
};
inline bool operator< (const OsVersion& lhs, const OsVersion& rhs) { return lhs.major != rhs.major ? lhs.major < rhs.major : lhs.minor < rhs.minor; }
inline bool operator==(const OsVersion& lhs, const OsVersion& rhs) { return lhs.major == rhs.major && lhs.minor == rhs.minor; }
//version overview: http://msdn.microsoft.com/en-us/library/ms724834(VS.85).aspx
const OsVersion osVersionWin81 (6, 3);
const OsVersion osVersionWin8 (6, 2);
const OsVersion osVersionWin7 (6, 1);
const OsVersion osVersionWinVista (6, 0);
const OsVersion osVersionWinServer2003(5, 2);
const OsVersion osVersionWinXp (5, 1);
/*
NOTE: there are two basic APIs to check Windows version: (empiric study following)
GetVersionEx -> reports version considering compatibility mode (and compatibility setting in app manifest since Windows 8.1)
VerifyVersionInfo -> always reports *real* Windows Version
*/
//GetVersionEx()-based APIs:
OsVersion getOsVersion();
inline bool win81OrLater () { using namespace std::rel_ops; return getOsVersion() >= osVersionWin81; }
inline bool win8OrLater () { using namespace std::rel_ops; return getOsVersion() >= osVersionWin8; }
inline bool win7OrLater () { using namespace std::rel_ops; return getOsVersion() >= osVersionWin7; }
inline bool vistaOrLater () { using namespace std::rel_ops; return getOsVersion() >= osVersionWinVista; }
inline bool winServer2003orLater() { using namespace std::rel_ops; return getOsVersion() >= osVersionWinServer2003; }
inline bool winXpOrLater () { using namespace std::rel_ops; return getOsVersion() >= osVersionWinXp; }
//VerifyVersionInfo()-based APIs:
bool isRealOsVersion(const OsVersion& ver);
//######################### implementation #########################
inline
OsVersion getOsVersion()
{
OSVERSIONINFO osvi = {};
osvi.dwOSVersionInfoSize = sizeof(osvi);
if (!::GetVersionEx(&osvi)) //38 ns per call! (yes, that's nano!) -> we do NOT miss C++11 thread-safe statics right now...
{
assert(false);
return OsVersion();
}
return OsVersion(osvi.dwMajorVersion, osvi.dwMinorVersion);
}
inline
bool isRealOsVersion(const OsVersion& ver)
{
OSVERSIONINFOEX verInfo = {};
verInfo.dwOSVersionInfoSize = sizeof(verInfo);
verInfo.dwMajorVersion = ver.major;
verInfo.dwMinorVersion = ver.minor;
//Syntax: http://msdn.microsoft.com/en-us/library/windows/desktop/ms725491%28v=vs.85%29.aspx
DWORDLONG conditionMask = 0;
VER_SET_CONDITION(conditionMask, VER_MAJORVERSION, VER_EQUAL);
VER_SET_CONDITION(conditionMask, VER_MINORVERSION, VER_EQUAL);
const bool rv = ::VerifyVersionInfo(&verInfo, VER_MAJORVERSION | VER_MINORVERSION, conditionMask)
== TRUE; //silence VC "performance warnings"
assert(rv || GetLastError() == ERROR_OLD_WIN_VERSION);
return rv;
}
}
#endif //WINDOWS_VERSION_HEADER_238470348254325
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