[2015] | 1 | // ===========================================================================
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| 2 | // (C) 1999 Vienna University of Technology
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| 3 | // ===========================================================================
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| 4 | // NAME: BenchTimer
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| 5 | // TYPE: c++ code
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| 6 | // PROJECT: Urban Viz/yare (yet another rendering engine)
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| 7 | // CONTENT: Very accurate timer for Win32 systems
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| 8 | // (uses QueryPerformanceCounter, usually microseconds)
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| 9 | // VERSION: 0.1
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| 10 | // ===========================================================================
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| 11 | // AUTHORS: mw Michael Wimmer
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| 12 | // ===========================================================================
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| 13 | // HISTORY:
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| 14 | //
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| 15 | // 15-jul-99 14:00:00 mw created
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| 16 | // ===========================================================================
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| 17 | // $Header: /usr/local/cvsyare/cvsyamp/src/yareutils/BenchTimer.cpp,v 1.1 2002/11/14 15:22:58 wimmer Exp $
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| 18 | // ===========================================================================
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| 19 |
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| 20 | #ifdef WIN32
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| 21 |
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| 22 | #include "BenchTimer.h"
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| 23 |
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| 24 | #include "merror.h"
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| 25 |
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| 26 | // ---------------------------------------------------------------------------
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| 27 | // class BenchTimer implementation
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| 28 | // ---------------------------------------------------------------------------
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| 29 |
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| 30 |
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| 31 | LARGE_INTEGER BenchTimer::frequency;
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| 32 | bool BenchTimer::isinitialized = false;
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| 33 | bool BenchTimer::available = false;
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| 34 |
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| 35 | // this retrieves the timer frequency - will be called by constructor
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| 36 | void BenchTimer::InitClass(bool verbose)
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| 37 | {
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| 38 | if (QueryPerformanceFrequency(&frequency))
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| 39 | {
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| 40 | available = true;
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| 41 | if (verbose)
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| 42 | //OUT1(SV(double(frequency.QuadPart)));
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| 43 | OUT1("QueryPerformanceCounter Frequency: " << double(frequency.QuadPart));
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| 44 | }
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| 45 | else
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| 46 | {
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| 47 | EOUT("No high resolution perfomance counter installed!");
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| 48 | available = false;
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| 49 | frequency.QuadPart = 1;
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| 50 | }
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| 51 |
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| 52 | isinitialized = true;
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| 53 | }
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| 54 |
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| 55 | /// returns the frequency
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| 56 | double BenchTimer::GetFrequency(bool verbose)
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| 57 | {
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| 58 | if (!isinitialized)
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| 59 | InitClass(verbose);
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| 60 |
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| 61 | return double(frequency.QuadPart);
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| 62 | }
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| 63 |
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| 64 | #endif // WIN32
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