src/Clock.h

   1 #ifndef SIM_CLOCK_H
   2 #define SIM_CLOCK_H
   3
   4 #ifdef __GNUC__
   5 #       include <ext/slist>
   6 #else
   7 #       include <list>
   8 #endif
   9
  10 #include <utility>
  11 #include "Types.h"
  12
  13 namespace sim {
  14         typedef unsigned long long ClockOffset;
  15
  16         /**
  17          * @author Tom Haber
  18          * @date Apr 27, 2008
  19          * @brief Template clock class
  20          *
  21          * This class is used by SimulationClock and Bus to provide the
  22          * timings for SimulationObjects and Hardware. It implements
  23          * the basic clock functionality: stepping and breakpoints.
  24          *
  25          * TODO optimize, some methods have a lazy implementation
  26          * TODO slist might be too slow (also has portability issues)
  27          */
  28         template <class Type>
  29         class Clock {
  30                 public:
  31                         Clock() : value(0) {}
  32
  33                 public:
  34                         void setBreak(ClockOffset cycle, Type *obj);
  35                         void setBreakDelta(ClockOffset delta, Type *obj);
  36                         void setDividedBreak(ClockOffset prescaler, ClockOffset delta, Type *obj);
  37                         void clearBreak(Type *obj);
  38                         void clearBreak(ClockOffset cycle);
  39                         void reassignBreak(ClockOffset oldCycle, ClockOffset newCycle, Type *obj);
  40                         void reassignBreak(Type *obj, ClockOffset newCycle);
  41                         void reassignBreakDelta(ClockOffset delta, Type *obj);
  42
  43                 public:
  44                         void step();
  45                         void clearAll();
  46
  47                         ClockOffset ticks() const { return value; }
  48                         bool isEmpty() const { return objects.empty(); }
  49
  50                 private:
  51                         ClockOffset value;
  52
  53                         typedef std::pair<ClockOffset, Type*> Break;
  54 #ifdef __GNUC__
  55                         typedef __gnu_cxx::slist< Break > ClockList;
  56 #else
  57                         typedef std::slist< Break > ClockList;
  58 #endif
  59                         typedef typename ClockList::iterator ClockListIt;
  60                         ClockList objects;
  61         };
  62
  63         template <class Type>
  64         inline void Clock<Type>::setBreakDelta(ClockOffset delta, Type *obj) {
  65                 setBreak( value + delta, obj );
  66         }
  67
  68 }
  69
  70 #ifndef SIM_CLOCK_INC
  71 #       include "Clock.inc"
  72 #endif
  73 #endif /*SIM_CLOCK_H*/