BLRealTimeMonitor Class Reference

#include <BLRealTimeMonitor.hh>

List of all members.

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Detailed Description

class BLRealTimeMonitor creates a versatile multi-state monitor of real time usage, with resolution of microseconds (or the system clock resolution).

This entire class is inline.

Public Member Functions
	BLRealTimeMonitor ()
	constructor and destructor.
	~BLRealTimeMonitor ()
void	setState (int newState)
	setState() stops accumulating in the previous state, and starts accumulating in the new state. state can range from 0 to 7; -1 means no accumulation. initial state is -1.
void	incrState (int incr=1)
	incrState() adds the increment to the current state.
float	getTime (int _state)
	getTime() returns the total elapsed time (in seconds) while in the specified state.
Static Public Member Functions
static float	estimateResolution ()
	estimateResolution() will estimate the resolution of the real-time monitor.
static float	estimateResolution1 ()
	estimateResolution1() will make a single estimate of the resolution of the real-time monitor.
Private Attributes
long long	total [8]
int	state

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Constructor & Destructor Documentation

BLRealTimeMonitor::BLRealTimeMonitor

(

)

[inline]

constructor and destructor.

References state, and total.

                            { for(int i=0; i<8; ++i) total[i]=0LL; state=-1; 
        }

BLRealTimeMonitor::~BLRealTimeMonitor

(

)

[inline]

{ }

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Member Function Documentation

void BLRealTimeMonitor::setState

(

int

newState

)

[inline]

setState() stops accumulating in the previous state, and starts accumulating in the new state. state can range from 0 to 7; -1 means no accumulation. initial state is -1.

References state, BLTime::timeus(), and total.

Referenced by incrState().

                                    {
                long long now = BLTime::timeus();
                if(state >= 0 && state < 8) total[state] += now;
                state = newState;
                if(state >= 0 && state < 8) total[state] -= now;
        }

void BLRealTimeMonitor::incrState

(

int

incr = 1

)

[inline]

incrState() adds the increment to the current state.

References setState(), and state.

{ setState(state+incr); }

float BLRealTimeMonitor::getTime

(

int

_state

)

[inline]

getTime() returns the total elapsed time (in seconds) while in the specified state.

References state, BLTime::timeus(), and total.

                                  {
                if(_state < 0 || _state >= 8) return 0.0;
                long long v=total[_state];
                if(state == _state) v += BLTime::timeus();
                return (float)v/1.0E6;
        }

static float BLRealTimeMonitor::estimateResolution

(

)

[inline, static]

estimateResolution() will estimate the resolution of the real-time monitor.

References estimateResolution1().

                                          {
                float v=0.0;
                for(int i=0; i<100; ++i) {
                        v += estimateResolution1();
                        if(v > 0.1)
                                return v/(i+1);
                }
                return v/100.0;
        }

static float BLRealTimeMonitor::estimateResolution1

(

)

[inline, static]

estimateResolution1() will make a single estimate of the resolution of the real-time monitor.

References BLTime::timeus().

Referenced by estimateResolution().

                                           {
                long long now=0LL, prev=BLTime::timeus();
                do {
                        now = BLTime::timeus();
                } while(now == prev);
                prev = now;
                do {
                        now = BLTime::timeus();
                } while(now == prev);
                return (float)(now-prev)/1.0E6;
        }

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Member Data Documentation

long long BLRealTimeMonitor::total[8] [private]

Referenced by BLRealTimeMonitor(), getTime(), and setState().

int BLRealTimeMonitor::state [private]

Referenced by BLRealTimeMonitor(), getTime(), incrState(), and setState().

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The documentation for this class was generated from the following file:

• BLRealTimeMonitor.hh