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PerfTimer.cpp 1.5 KB

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  1. //
  2. // Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
  3. //
  4. // This software is provided 'as-is', without any express or implied
  5. // warranty. In no event will the authors be held liable for any damages
  6. // arising from the use of this software.
  7. // Permission is granted to anyone to use this software for any purpose,
  8. // including commercial applications, and to alter it and redistribute it
  9. // freely, subject to the following restrictions:
  10. // 1. The origin of this software must not be misrepresented; you must not
  11. // claim that you wrote the original software. If you use this software
  12. // in a product, an acknowledgment in the product documentation would be
  13. // appreciated but is not required.
  14. // 2. Altered source versions must be plainly marked as such, and must not be
  15. // misrepresented as being the original software.
  16. // 3. This notice may not be removed or altered from any source distribution.
  17. //
  18. #include "PerfTimer.h"
  19. #if defined(WIN32)
  20. // Win32
  21. #include <windows.h>
  22. TimeVal getPerfTime()
  23. {
  24. __int64 count;
  25. QueryPerformanceCounter((LARGE_INTEGER*)&count);
  26. return count;
  27. }
  28. int getPerfTimeUsec(const TimeVal duration)
  29. {
  30. static __int64 freq = 0;
  31. if (freq == 0)
  32. QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
  33. return (int)(duration*1000000 / freq);
  34. }
  35. #else
  36. // Linux, BSD, OSX
  37. #include <sys/time.h>
  38. TimeVal getPerfTime()
  39. {
  40. timeval now;
  41. gettimeofday(&now, 0);
  42. return (TimeVal)now.tv_sec*1000000L + (TimeVal)now.tv_usec;
  43. }
  44. int getPerfTimeUsec(const TimeVal duration)
  45. {
  46. return (int)duration;
  47. }
  48. #endif