Platform.cpp

//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//

// Headers
#include <SFML/System/Win32/Platform.hpp>
#include <windows.h>
 
 
namespace sf
{
namespace priv
{
double Platform::GetSystemTime()
{
    static LARGE_INTEGER Frequency;
    static BOOL          UseHighPerformanceTimer = QueryPerformanceFrequency(&Frequency);
 
    if (UseHighPerformanceTimer)
    {
        // High performance counter available : use it
        LARGE_INTEGER CurrentTime;
        QueryPerformanceCounter(&CurrentTime);
 
        return static_cast<double>(CurrentTime.QuadPart) / Frequency.QuadPart;
    }
    else
    {
        // High performance counter not available : use GetTickCount (less accurate)
        return GetTickCount() * 0.001;
    }
}
 

void Platform::Sleep(float Time)
{
    ::Sleep(static_cast<DWORD>(Time * 1000));
}
 
} // namespace priv
 
} // namespace sf