[2582] | 1 | // ================================================================
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| 2 | // $Id: timer.h,v $
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| 3 | //
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| 4 | // timer.h
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| 5 | // CTimer class to measure the elapsed time
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| 6 | //
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| 7 | // Class: CTimer
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| 8 | //
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| 9 | // REPLACEMENT_STRING
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| 10 | //
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| 11 | // Copyright by Vlastimil Havran, 2007 - email to "vhavran AT seznam.cz"
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| 12 | // Initial coding by Vlastimil Havran, 1998.
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| 13 |
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| 14 | #ifndef __TIMER_H__
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| 15 | #define __TIMER_H__
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| 16 |
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| 17 | // GOLEM headers
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| 18 | #include "configh.h"
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| 19 |
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| 20 | // standard headers
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| 21 | #ifdef __UNIX__
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| 22 | #include <sys/resource.h>
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| 23 | #endif
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| 24 |
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| 25 | #include <ctime>
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| 26 |
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| 27 | namespace GtpVisibilityPreprocessor {
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| 28 |
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| 29 | // Class CTimer is designed to measure the user/(user+system)/real time
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| 30 | // taken by the processor within a portion of source code.
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| 31 | class CTimer
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| 32 | {
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| 33 | private: // data
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| 34 | #ifdef __UNIX__
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| 35 | // timing in OS UNIX
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| 36 | mutable struct rusage begrusage;
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| 37 | mutable struct rusage endrusage;
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| 38 | #endif // __UNIX__
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| 39 |
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| 40 | /// true if InitTiming() has already been called
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| 41 | static bool initTimingCalled;
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| 42 |
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| 43 | /// accumulated real time (returned by RealTime() method)
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| 44 | mutable double realTime;
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| 45 | /// accumulated userTime
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| 46 | mutable double userTime;
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| 47 | /// accumulated user+system time
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| 48 | mutable double systemTime;
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| 49 | /// real time at the last start event
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| 50 | mutable double lastRealTime;
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| 51 | /// user time at the last start event
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| 52 | mutable double lastUserTime;
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| 53 | /// system time at the last start event
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| 54 | mutable double lastSystemTime;
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| 55 |
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| 56 | /// the number of stopping this timer
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| 57 | mutable int countStop;
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| 58 | /// if the timer is running at this time
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| 59 | mutable bool running;
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| 60 |
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| 61 | private: // methods
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| 62 |
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| 63 | /// interior implementation of Stop()
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| 64 | void _start() const;
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| 65 | // interior implementation of Start()
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| 66 | void _stop() const;
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| 67 |
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| 68 | /// finds out whether performance timer is present (WIN32)
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| 69 | void _initTiming();
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| 70 |
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| 71 | public: // methods
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| 72 |
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| 73 | /// default constructor
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| 74 | CTimer() { Reset(); if( ! initTimingCalled ) _initTiming(); }
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| 75 | /// default destructor
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| 76 | ~CTimer() {}
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| 77 | /// reset the time to zero all time values
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| 78 | void Reset();
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| 79 | /// restart the timer from zero
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| 80 | void Restart() { Reset(); Start();}
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| 81 | /// start/restart the timer to measure the following events
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| 82 | void Start() { _start(); }
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| 83 | /// stop the timer not to measure the following events
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| 84 | void Stop() { _stop(); }
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| 85 | /// returns true if timer is running, otherwise false
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| 86 | bool IsRunning() const { return running;}
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| 87 | /// returns the real time measured by timer in seconds
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| 88 | double RealTime() const;
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| 89 | /// returns the user time measured by timer in seconds
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| 90 | double UserTime() const;
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| 91 | /// returns the user+system time measured by timer in seconds
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| 92 | double SystemTime() const;
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| 93 | };
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| 94 |
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| 95 |
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| 96 | }
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| 97 |
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| 98 | #endif // __TIMER_H__
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