122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
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/*
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* randchnl.h
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*
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* Copyright (c) 1995 by DataBeam Corporation, Lexington, KY
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*
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* Abstract:
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* This is the interface file for the RandomChannelGenerator class. This
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* class inherits from the RandomNumberGenerator class. On instantiation,
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* instances of this class will internally generate a random number which
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* falls within the allowable range of dynamic channel values. Channel
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* assignments are then generated by incrementing this value each time a
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* new assignment is requested. Once the maximum allowable value has been
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* assigned, the next value to be generated "wraps around" to the minimum
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* allowable value.
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*
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* Obviously, this class does not generate completely random channel
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* values for each request. With a completely random generator, it is
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* possible to delete a channel in MCS, and then have the random number
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* generator assign the same value as the deleted channel before all
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* components of the system even know that the channel was deleted to
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* start with, thus causing erratic behavior in the system. In this
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* class, no channel can be reassigned until all other possible channels
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* have been assigned.
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*
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* This class can be modifed in the future to incorporate additional
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* "randomness" into the algorithm and still not reassign any channel
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* numbers before all other possible values are used. This, however,
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* would be at the expense of performance and/or memory resources.
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*
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* Caveats:
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* None.
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*
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* Author:
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* Alan D. May
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*/
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#ifndef _RANDOM_CHANNEL_GENERATOR_
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#define _RANDOM_CHANNEL_GENERATOR_
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#include "databeam.h"
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#include "random.h"
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/*
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* The definition of the RandomChannelGenerator class.
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*/
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class RandomChannelGenerator
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{
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public:
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RandomChannelGenerator ();
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virtual ~RandomChannelGenerator ();
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RandomValue GetRandomChannel ();
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private:
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ULong Current_Channel;
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};
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typedef RandomChannelGenerator * PRandomChannelGenerator;
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/*
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* RandomChannelGenerator ()
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*
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* Functional Description:
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* The constructor creates a random channel generator object by calling the
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* constructor for the parent class, RandomNumberGenerator. This then
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* automatically seeds the random number generator with the current time.
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* The default algorithm will be used.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* ~RandomChannelGenerator ()
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*
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* Public
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*
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* Functional Description:
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* This is the destructor for the RandomChannelGenerator class.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* RandomValue GetRandomChannel ()
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*
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* Public
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*
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* Functional Description:
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* This method returns a valid dynamic channel number.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* A RandomValue in the range of valid dynamic channel values.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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#endif
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