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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef CARRAY_HPP
#define CARRAY_HPP
#include "ndbd_malloc.hpp"
/**
* Template class used for implementing an c - array
*/
template <class T>
class CArray {
public:
CArray();
~CArray();
/**
* Set the size of the pool
*
* Note, can currently only be called once
*/
bool setSize(Uint32 noOfElements, bool exit_on_error = true);
/**
* Get size
*/
Uint32 getSize() const;
/**
* Update p value for ptr according to i value
*/
void getPtr(Ptr<T> &) const;
/**
* Get pointer for i value
*/
T * getPtr(Uint32 i) const;
/**
* Update p & i value for ptr according to <b>i</b> value
*/
void getPtr(Ptr<T> &, Uint32 i) const;
private:
Uint32 size;
T * theArray;
};
template <class T>
inline
CArray<T>::CArray(){
size = 0;
theArray = 0;
}
template <class T>
inline
CArray<T>::~CArray(){
if(theArray != 0){
ndbd_free(theArray, size * sizeof(T));
theArray = 0;
}
}
/**
* Set the size of the pool
*
* Note, can currently only be called once
*/
template <class T>
inline
bool
CArray<T>::setSize(Uint32 noOfElements, bool exit_on_error){
if(size == noOfElements)
return true;
theArray = (T *)ndbd_malloc(noOfElements * sizeof(T));
if(theArray == 0)
{
if (!exit_on_error)
return false;
ErrorReporter::handleAssert("CArray<T>::setSize malloc failed",
__FILE__, __LINE__, NDBD_EXIT_MEMALLOC);
return false; // not reached
}
size = noOfElements;
return true;
}
template<class T>
inline
Uint32
CArray<T>::getSize() const {
return size;
}
template <class T>
inline
void
CArray<T>::getPtr(Ptr<T> & ptr) const {
const Uint32 i = ptr.i;
if(i < size){
ptr.p = &theArray[i];
return;
} else {
ErrorReporter::handleAssert("CArray<T>::getPtr", __FILE__, __LINE__);
}
}
template <class T>
inline
T *
CArray<T>::getPtr(Uint32 i) const {
if(i < size){
return &theArray[i];
} else {
ErrorReporter::handleAssert("CArray<T>::getPtr", __FILE__, __LINE__);
return 0;
}
}
template <class T>
inline
void
CArray<T>::getPtr(Ptr<T> & ptr, Uint32 i) const {
ptr.i = i;
if(i < size){
ptr.p = &theArray[i];
return;
} else {
ErrorReporter::handleAssert("CArray<T>::getPtr", __FILE__, __LINE__);
}
}
#endif
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