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Unit.h
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/*******************************************************************************
*
* File: Unit.h
*
* Contents: Declaration of Unit base-class.
*
* Copyright 2017
*
* Author: David Juhasz (david.juhasz@tuwien.ac.at)
*
******************************************************************************/
#ifndef ROSA_CORE_UNIT_H
#define ROSA_CORE_UNIT_H
#include <atomic>
#include <ostream>
#include <string>
namespace rosa {
// Base class for every entity in the system that has to be identified and
// traced.
class Unit {
private:
// Number of Units constructed in the system.
static std::atomic<uint64_t> CountUnits;
// Number of live units, those having been constructed and not yet destroyed.
static std::atomic<uint64_t> LiveUnits;
public:
// System-assigned unique identifier of the Unit instance,
// based on the static member field CountUnits.
const uint64_t Id;
// Textual identifier of the Unit instance. Defaults to a text referring to
// the Id value of the Unit, unless otherwise defined via a constructor
// argument. The Name of a Unit is not necessarily unique in the system.
const std::string Name;
// Ctor.
Unit(const std::string &Name = std::string()) noexcept;
// Dtor.
virtual ~Unit(void) noexcept;
// Dumping the object into a string for tracing purposes,
// subclasses are supposed to override this function.
virtual std::string dump(void) const noexcept;
};
// Helper function dumping the given Unit instance to the given output stream.
std::ostream &operator<<(std::ostream &os, const Unit &unit);
} // End namespace rosa
#endif // ROSA_CORE_UNIT_H

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