170 lines
5.0 KiB
C++
170 lines
5.0 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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March 2006, M. Spiekermann. The classes ~FunInfo~ and ~FunVector~ are offered
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as Interface since they may be useful for other operator implementations outside
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the ArrayAlgebra.
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*/
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#ifndef SEC_FunVector_H
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#define SEC_FunVector_H
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#include <vector>
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#include "Algebra.h"
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/*
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1 Data Structures for Parameter Functions
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The datastructures below may be useful for value mappings of operators
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which work with more than one parameter function.
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1.1 Class ~FunInfo~
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Each object of this class contains a function (given by a Supplier object)
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together with some additional information, e.g. an assigned number
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(["]function-id["]) and an assigned name.
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A function can be requested with given parameters. The system measures, sums up
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and prints out the used CPU time of the function. The total number of function
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requests is also available.
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*/
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class FunInfo;
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bool operator<(const FunInfo&, const FunInfo&);
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std::ostream& operator<<(std::ostream&, const FunInfo&);
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class FunInfo {
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public :
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FunInfo();
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FunInfo(int, std::string, Supplier);
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double getTime();
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Supplier getSupplier() { return supplier; }
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const std::string& getName() { return name; }
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void request(Word*, int, Word&, std::string);
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void request(Word, Word&, std::string);
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void request(Word, Word, Word&, std::string);
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void open();
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void close();
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private :
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int no;
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std::string name;
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Supplier supplier;
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int timesUsed;
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double consumedTime;
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friend bool ::operator<(const FunInfo&, const FunInfo&);
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friend std::ostream& ::operator<<(std::ostream&, const FunInfo&);
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};
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/*
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1.2 Class ~FunVector~
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This class uses the class template ["]vector["]. Each object of the class
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~FunVector~ contains a vector of ~FunInfo~ objects. The vector is initialized
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with a set of functions (given by a Supplier object) and an array of function
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names. After initializing the vector, a single function or all functions stored
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in the vector may be requested.
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The class also provides some useful methods for the implementation of the
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switch- and the select algorithm.
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*/
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class FunVector {
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public:
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void load(Word, Word*);
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void requestFun(int, Word, Word&, std::string);
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void requestFun(int, Word, Word, Word&, std::string);
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void requestAll(Word, Word&, std::string);
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void requestAll(Word, Word, Word&, std::string);
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void open(const size_t pos) { funInfos[pos].open(); }
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void close(const size_t pos) { funInfos[pos].close(); }
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void openAll() { sendMsgForAll(OPEN); }
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void closeAll() { sendMsgForAll(CLOSE); }
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int getMin();
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inline FunInfo& get(const size_t pos) { return funInfos[pos]; }
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inline size_t size() { return funInfos.size(); }
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void writeSummary();
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void reorder();
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private:
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void sendMsgForAll(const int msg);
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std::vector<FunInfo> funInfos;
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void addFunction(std::string, Supplier);
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};
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/*
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1.3 Class ~SwitchAlgorithm~
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The switch algorithm is implemented as a sub-class of the class ~FunVector~.
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An object of the class ~SwitchAlgorithm~ is initialized like an object of the
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class ~FunInfo~. For each requests, the switch algorithm chooses the function
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with the (so far) lowest total used CPU time.
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*/
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class SwitchAlgorithm : public FunVector {
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public:
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void request(Word, Word&, std::string);
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void request(Word, Word, Word&, std::string);
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};
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/*
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1.4 Class ~SelectAlgorithm~
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The select algorithm is implemented as a sub-class of the class ~FunVector~.
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An object of the class ~SelectAlgorithm~ is initialized analogous to an object
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of the class ~FunInfo~. In addition to a set of functions, the parameter
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~testSize~ has to be set to a number greater than zero. For the first
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~testSize~ requests, all functions are used for evaluation. After that, the
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function with the (so far) lowest total used CPU time is selected for all
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further requests. However, this selection will not be changed later on.
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*/
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class SelectAlgorithm : public FunVector {
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public:
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SelectAlgorithm();
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void setTestSize(int);
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void request(Word, Word&, std::string);
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void request(Word, Word, Word&, std::string);
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private:
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int testSize;
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int selectedFun;
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int counter;
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};
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bool operator<( const FunInfo& f1, const FunInfo& f2 );
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std::ostream& operator<<( std::ostream& os, const FunInfo& f );
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#endif
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