over loading new and delete question

hi all
   i want overload new and delete . so i can use my buff

my os windows 2k sp4
compiler vs 2003

code:

#include "ace/Task.h"
#include "ace/OS_NS_unistd.h"

#include <iostream>
using namespace std;

#define table_len 1024*10240

class p_table;
class process {
public:
    process() { /*cout<<"construct"<<'\n'; */}
    ~process() { /*cout<<"destruct"<<'\n'; */}
    void * operator new(size_t s)
    {
        p_table *p =p_table::get_table();
// errow p_table *p =p_table::get_table();
// i think it is right can you show me the reason?
// thank you
        return p->pop();
    }

    void operator delete (void *p)
    {
        p_table *p =p_table::get_table();
//errow
//
        p->push((process * )p);
    }

private:
    double mm;
    long xxx;
    int age;
    double aaa;
    float ssss;

};

class p_table
{

public:
    static p_table* get_table()
    {
        static p_table tmp;
        return &tmp;
    }
    process * pop()
    {

        process * newnod = NULL;
        mutex_.acquire();
        if ( m_size)
        {
            newnod = tab[m_size-1];
            tab[m_size-1] = NULL;
            m_size--;
        }
        else
            newnod = ( process *)::operator new (sizeof (process));
        mutex_.release();

        return newnod;

    }

    bool push (process * p)
    {
        mutex_.acquire();
        if ( m_size < table_len)
        {
            tab[m_size] = p;
            m_size++;
        }
        else
            ::operator delete( p);
        mutex_.release();
        return true;
    }

private:
    ACE_Thread_Mutex mutex_;
    process * tab[table_len];
    int m_size;

protected:

    p_table():m_size(0)
    {
        mutex_.acquire();
        for (int i = 0; i < table_len ; i++)
            tab[i] = NULL;
        mutex_.release();
    }
};

  there are some bug . can you fix it? thanks

                        papaka