pdutil/h/tunableConst.h

   1 /*
   2  * tunableConstant - a constant that might be changed during execution.
   3  *
   4  * $Log: tunableConst.h,v $
   5  * Revision 1.1  1994/02/25 00:25:58  hollings
   6  * added tunable constants.
   7  *
   8  *
   9  */
  10 #ifndef TUNABLE_CONST_H
  11 #define TUNABLE_CONST_H
  12
  13 #include "util/h/list.h"
  14
  15 typedef Boolean (*isValidFunc)(float newVale);
  16 typedef void (*changeValCallBackFunc)(float value);
  17
  18 class tunableConstant {
  19     public:
  20         tunableConstant(float initialValue,
  21                         float min,
  22                         float max,
  23                         changeValCallBackFunc cb,
  24                         char *name,
  25                         char *desc);
  26         tunableConstant(float initialValue,
  27                         isValidFunc,
  28                         changeValCallBackFunc cb,
  29                         char *name,
  30                         char *desc);
  31         float getValue() { return value; }
  32         char *getDesc() { return(desc); }
  33         char *getName() { return(name); }
  34         Boolean setValue(float newVal) {
  35             if ((isValidValue) && isValidValue(newVal)) {
  36                 if (newValueCallBack) newValueCallBack(newVal);
  37                 return(TRUE);
  38             } else if (simpleRangeCheck(newVal)) {
  39                 if (newValueCallBack) newValueCallBack(newVal);
  40                 return(TRUE);
  41             } else {
  42                 return(FALSE);
  43             }
  44         }
  45     private:
  46         char *desc;
  47         char *name;
  48         float value;
  49         float min, max;
  50         isValidFunc isValidValue;
  51         Boolean simpleRangeCheck(float val);
  52         changeValCallBackFunc newValueCallBack;
  53         static List<tunableConstant*> allConstants;
  54 };
  55
  56 #endif