signal-time-dependent.h

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// -*- mode: c++ -*-
// Copyright 2010, François Bleibel, Thomas Moulard, Olivier Stasse,
// JRL, CNRS/AIST.
//
 
#ifndef DYNAMIC_GRAPH_SIGNAL_TIME_DEPENDENT_H
#define DYNAMIC_GRAPH_SIGNAL_TIME_DEPENDENT_H
#include <dynamic-graph/signal.h>
#include <dynamic-graph/time-dependency.h>
 
namespace dynamicgraph {
template <class T, class Time>
class SignalTimeDependent : public virtual Signal<T, Time>,
                            public TimeDependency<Time> {
  // TimeDependency<Time> timeDependency;
 
 public:
  SignalTimeDependent(std::string name = "");
  SignalTimeDependent(const SignalArray_const<Time> &arr,
                      std::string name = "");
  SignalTimeDependent(boost::function2<T &, T &, Time> t,
                      const SignalArray_const<Time> &sig,
                      std::string name = "");
 
  virtual ~SignalTimeDependent() {}
 
  inline const T &operator()(const Time &t1) { return access(t1); }
  const T &access(const Time &t1);
 
  virtual void addDependency(const SignalBase<Time> &signal);
  virtual void removeDependency(const SignalBase<Time> &signal);
  virtual void clearDependencies();
 
  std::ostream &writeGraph(std::ostream &os) const { return os; }
 
  std::ostream &displayDependencies(std::ostream &os, const int depth = -1,
                                    std::string space = "",
                                    std::string next1 = "",
                                    std::string next2 = "") const {
    return TimeDependency<Time>::displayDependencies(os, depth, space, next1,
                                                     next2);
  }
 
  virtual bool needUpdate(const Time &t) const;
  virtual void setPeriodTime(const Time &p);
  virtual Time getPeriodTime() const;
};
 
/* -------------------------------------------- */
 
template <class T, class Time>
SignalTimeDependent<T, Time>::SignalTimeDependent(std::string name)
    : Signal<T, Time>(name), TimeDependency<Time>(this) {}
 
template <class T, class Time>
SignalTimeDependent<T, Time>::SignalTimeDependent(
    const SignalArray_const<Time> &arr, std::string name)
    : Signal<T, Time>(name), TimeDependency<Time>(this, arr) {}
 
template <class T, class Time>
SignalTimeDependent<T, Time>::SignalTimeDependent(
    boost::function2<T &, T &, Time> t, const SignalArray_const<Time> &sig,
    std::string name)
    : Signal<T, Time>(name), TimeDependency<Time>(this, sig) {
  this->setFunction(t);
}
 
template <class T, class Time>
const T &SignalTimeDependent<T, Time>::access(const Time &t1) {
  const bool up = TimeDependency<Time>::needUpdate(t1);
  // SignalBase<Time>::setReady(false);
 
  /*       std::cout << "Time before: "<< signalTime << " -- "   */
  /*            << t1<< "  -> Up: "<<up <<std::endl ;   */
  if (up) {
    TimeDependency<Time>::lastAskForUpdate = false;
    const T &Tres = Signal<T, Time>::access(t1);
    SignalBase<Time>::setReady(false);
    return Tres;
  } else {
    return Signal<T, Time>::accessCopy();
  }
}
 
template <class T, class Time>
void SignalTimeDependent<T, Time>::addDependency(
    const SignalBase<Time> &signal) {
  TimeDependency<Time>::addDependency(signal);
}
 
template <class T, class Time>
void SignalTimeDependent<T, Time>::removeDependency(
    const SignalBase<Time> &signal) {
  TimeDependency<Time>::removeDependency(signal);
}
 
template <class T, class Time>
void SignalTimeDependent<T, Time>::clearDependencies() {
  TimeDependency<Time>::clearDependency();
}
 
template <class T, class Time>
bool SignalTimeDependent<T, Time>::needUpdate(const Time &t) const {
  return TimeDependency<Time>::needUpdate(t);
}
 
template <class T, class Time>
void SignalTimeDependent<T, Time>::setPeriodTime(const Time &p) {
  TimeDependency<Time>::setPeriodTime(p);
}
template <class T, class Time>
Time SignalTimeDependent<T, Time>::getPeriodTime() const {
  return TimeDependency<Time>::getPeriodTime();
}
 
}  // end of namespace dynamicgraph
 
#endif