code project 上的内存管理的示例代码

/********************************************************************
    created:    2014/03/17 18:53
    filename:    main.cpp
    author:        Justme0 (http://blog.csdn.net/justme0)

    purpose:    code project 内存管理
*********************************************************************/
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <new>
using namespace std;

//    Overload the new operator
void *operator new ( size_t size , bool isAllocFailure )
{
    if ( isAllocFailure )
        return NULL;
    else
    {
        try
        {
            void *Memory    =    ::operator new ( size );
            return Memory;
        }
        catch ( std::bad_alloc )
        {
            return NULL;
        }
    }
    return NULL;
}

//    Overload placement delete operator so that exceptions from
//    constructors can be handled
void operator delete ( void * Memory , bool isAllocFailure )
{
    ::delete Memory;
}

void    SimpleFunction ( int MemCounter , bool AllFail )
{

    int        LocalCounter = ;
    char    *Mem1    =    new ( ( MemCounter == LocalCounter ++ ) || AllFail ) char [  ];
    if ( Mem1 != NULL )
        strcpy ( Mem1 , "First Memory" );

    char    *Mem2    =    new ( ( MemCounter == LocalCounter ++ ) || AllFail ) char [  ];
    if ( Mem2 != NULL )
        strcpy ( Mem2 , "Second Memory" );

    int        NumTimesLoop    =    ;
    int        LoopCounter        =    ;

    //    Create a Variable that will be allocate Inner Memory
    char    **InnerMemory    =    new ( ( MemCounter == LocalCounter ++ ) || AllFail ) char * [ NumTimesLoop ];

    //    Loop through and allocate the memory required
    for ( LoopCounter = ; LoopCounter < NumTimesLoop ; LoopCounter ++ )
    {
        InnerMemory [ LoopCounter ] = new ( ( MemCounter == LocalCounter ++ ) || AllFail ) char [  ];
    }

}

int main()
{
    for ( int counter = ; counter < ; counter ++ )
        SimpleFunction ( counter , false );
    SimpleFunction ( - , true );

    return ;
}