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/*
* Copyright (C) 2009 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <windows.h>
#include "common/platform.h"
#if _WIN32_WINNT_WINBLUE
#include <versionhelpers.h>
#endif
namespace rx {
#ifndef _WIN32_WINNT_WINBLUE
static bool IsWindowsVistaOrGreater()
{
OSVERSIONINFOEXW osvi = { };
osvi.dwOSVersionInfoSize = sizeof(osvi);
osvi.dwMajorVersion = HIBYTE(_WIN32_WINNT_VISTA);
osvi.dwMinorVersion = LOBYTE(_WIN32_WINNT_VISTA);
DWORDLONG condition = 0;
VER_SET_CONDITION(condition, VER_MAJORVERSION, VER_GREATER_EQUAL);
VER_SET_CONDITION(condition, VER_MINORVERSION, VER_GREATER_EQUAL);
return !!::VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION, condition);
}
#endif
bool isWindowsVistaOrGreater()
{
static bool initialized = false;
static bool cachedIsWindowsVistaOrGreater;
if (!initialized) {
initialized = true;
#if defined(ANGLE_ENABLE_WINDOWS_STORE)
cachedIsWindowsVistaOrGreater = true;
#else
cachedIsWindowsVistaOrGreater = IsWindowsVistaOrGreater();
#endif
}
return cachedIsWindowsVistaOrGreater;
}
} // namespace rx
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