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libsfml  1.6+dfsg2
Platform.cpp
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00001 
00002 //
00003 // SFML - Simple and Fast Multimedia Library
00004 // Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
00005 //
00006 // This software is provided 'as-is', without any express or implied warranty.
00007 // In no event will the authors be held liable for any damages arising from the use of this software.
00008 //
00009 // Permission is granted to anyone to use this software for any purpose,
00010 // including commercial applications, and to alter it and redistribute it freely,
00011 // subject to the following restrictions:
00012 //
00013 // 1. The origin of this software must not be misrepresented;
00014 //    you must not claim that you wrote the original software.
00015 //    If you use this software in a product, an acknowledgment
00016 //    in the product documentation would be appreciated but is not required.
00017 //
00018 // 2. Altered source versions must be plainly marked as such,
00019 //    and must not be misrepresented as being the original software.
00020 //
00021 // 3. This notice may not be removed or altered from any source distribution.
00022 //
00024 
00026 // Headers
00028 #include <SFML/System/Win32/Platform.hpp>
00029 #include <windows.h>
00030 
00031 
00032 namespace sf
00033 {
00034 namespace priv
00035 {
00039 double Platform::GetSystemTime()
00040 {
00041     static LARGE_INTEGER Frequency;
00042     static BOOL          UseHighPerformanceTimer = QueryPerformanceFrequency(&Frequency);
00043 
00044     if (UseHighPerformanceTimer)
00045     {
00046         // High performance counter available : use it
00047         LARGE_INTEGER CurrentTime;
00048         QueryPerformanceCounter(&CurrentTime);
00049 
00050         return static_cast<double>(CurrentTime.QuadPart) / Frequency.QuadPart;
00051     }
00052     else
00053     {
00054         // High performance counter not available : use GetTickCount (less accurate)
00055         return GetTickCount() * 0.001;
00056     }
00057 }
00058 
00059 
00063 void Platform::Sleep(float Time)
00064 {
00065     ::Sleep(static_cast<DWORD>(Time * 1000));
00066 }
00067 
00068 } // namespace priv
00069 
00070 } // namespace sf