referencecounter.h

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// -*- Mode: c++ -*-
 
#ifndef MYTHREFCOUNT_H_
#define MYTHREFCOUNT_H_
 
// Uncomment this line for more useful reference counting debugging
//#define EXTRA_DEBUG
// Uncomment the DEBUG define lines in referencecounter.cpp for
// even more debugging.
 
#include <QAtomicInt>
 
#ifdef EXTRA_DEBUG
#include <QString>
#else
class QString;
#endif
 
#include "mythbaseexp.h"
 
class MBASE_PUBLIC ReferenceCounter
{
  public:
    explicit ReferenceCounter(const QString &debugName, bool logDebug = true);
 
    virtual int IncrRef(void);
 
    virtual int DecrRef(void);
 
    static void PrintDebug(void);
  protected:
    virtual ~ReferenceCounter(void);
 
  protected:
#ifdef EXTRA_DEBUG
    const QString m_debugName;
#endif
    bool m_logDebug;
    QAtomicInt m_referenceCount {1};
};
 
class MBASE_PUBLIC ReferenceLocker
{
  public:
    explicit ReferenceLocker(ReferenceCounter *counter) : m_counter(counter) { }
    ~ReferenceLocker()
    {
        if (m_counter)
            m_counter->DecrRef();
    }
  private:
    ReferenceCounter *m_counter {nullptr};
};
 
#endif