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compute.h // // compute.h // // Copyright (C) 1996 Limit Point Systems, Inc. // // Author: Curtis Janssen <cljanss@limitpt.com> // Maintainer: LPS // // This file is part of the SC Toolkit. // // The SC Toolkit is free software; you can redistribute it and/or modify // it under the terms of the GNU Library General Public License as published by // the Free Software Foundation; either version 2, or (at your option) // any later version. // // The SC Toolkit is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Library General Public License for more details. // // You should have received a copy of the GNU Library General Public License // along with the SC Toolkit; see the file COPYING.LIB. If not, write to // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. // // The U.S. Government is granted a limited license as per AL 91-7. // #ifdef __GNUC__ #pragma interface #endif #ifndef _util_misc_compute_h #define _util_misc_compute_h #include <stdio.h> #include <util/container/avlset.h> #include <util/state/state.h> #include <util/state/stateio.h> namespace sc { class ResultInfo; class StateIn; class StateOut; typedef ResultInfo* ResultInfoP; class Compute { friend class ResultInfo; friend class AccResultInfo; private: AVLSet<ResultInfoP> _results; void add(ResultInfo*); // Prohibit copy Compute(const Compute&) {}; protected: virtual void compute() = 0; public: Compute(); virtual ~Compute(); virtual void obsolete(); }; class ResultInfo { protected: int _compute; int _computed; Compute* _c; // This make sure that the datum is up to date. If it is not then // Compute::compute() will be called. virtual void update(); protected: ResultInfo(StateIn&,Compute*); ResultInfo(const ResultInfo&,Compute*); virtual void save_data_state(StateOut&); virtual void restore_state(StateIn&); ResultInfo& operator=(const ResultInfo&); public: ResultInfo(Compute*c); virtual ~ResultInfo(); int& compute() { return _compute; } const int& compute() const { return _compute; } int compute(int c) { int r = _compute; _compute = c; return r; } int& computed() { return _computed; } const int& computed() const { return _computed; } virtual int needed() const; }; class AccResultInfo: public ResultInfo { private: double _actual_accuracy; double _desired_accuracy; protected: AccResultInfo(StateIn&,Compute*); AccResultInfo(const AccResultInfo&,Compute*); virtual void save_data_state(StateOut&); virtual void restore_state(StateIn&); AccResultInfo& operator=(const AccResultInfo&); void update(); public: AccResultInfo(Compute*c); ~AccResultInfo(); double actual_accuracy() const; double desired_accuracy() const; void set_desired_accuracy(double); void set_actual_accuracy(double); int computed_to_desired_accuracy() const { return computed() && _actual_accuracy <= _desired_accuracy; } int needed() const; }; } #include <util/misc/comptmpl.h> namespace sc { typedef NCResult<int> Resultint; typedef NCResult<double> Resultdouble; typedef NCAccResult<double> AccResultdouble; } #endif // Local Variables: // mode: c++ // c-file-style: "CLJ" // End: