Platform.cpp
1 //
3 // SFML - Simple and Fast Multimedia Library
4 // Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
5 //
6 // This software is provided 'as-is', without any express or implied warranty.
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24 
26 // Headers
28 #include <SFML/System/Win32/Platform.hpp>
29 #include <windows.h>
30 
31 
32 namespace sf
33 {
34 namespace priv
35 {
39 double Platform::GetSystemTime()
40 {
41  static LARGE_INTEGER Frequency;
42  static BOOL UseHighPerformanceTimer = QueryPerformanceFrequency(&Frequency);
43 
44  if (UseHighPerformanceTimer)
45  {
46  // High performance counter available : use it
47  LARGE_INTEGER CurrentTime;
48  QueryPerformanceCounter(&CurrentTime);
49 
50  return static_cast<double>(CurrentTime.QuadPart) / Frequency.QuadPart;
51  }
52  else
53  {
54  // High performance counter not available : use GetTickCount (less accurate)
55  return GetTickCount() * 0.001;
56  }
57 }
58 
59 
63 void Platform::Sleep(float Time)
64 {
65  ::Sleep(static_cast<DWORD>(Time * 1000));
66 }
67 
68 } // namespace priv
69 
70 } // namespace sf