core/sql/ustat/hs_auto.h

/**********************************************************************
// @@@ START COPYRIGHT @@@
//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
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#ifndef HSAUTO_H
#define HSAUTO_H
/* -*-C++-*-
 *****************************************************************************
 *
 * File:         hs_auto.h
 * Description:  Classes to automatically delete heap objects
 *               at scope exit, same as auto objects.
 * Created:      03/25/96
 * Language:     C++
 *
 *
 *
 *
 *****************************************************************************
 */

#include "hs_log.h"

#define NANewArray        NewArray

// -----------------------------------------------------------------------
// Allocate an array of T off heap and wrap it up in an auto object.
// Example:
//    T *pt;
//    NewArray<T> temp(pt, 100);
//
// Deallocate is automatic at scope exit.
// -----------------------------------------------------------------------
template <class T> class NewArray {

public:

  NewArray(T *&source, Lng32 len)
    : ptr_(source)
    {
      source = new(STMTHEAP) T[len];
      HS_ASSERT(source != NULL);
    }

  ~NewArray()
    {
    }

protected:

  T *&ptr_;

private:

  NewArray();
  NewArray(const NewArray<T> &other);
  NewArray<T>& operator=(const NewArray<T> &other);
};


#endif /* HSAUTO_H */