Obtaining the amount of freed memory

Hi there.

I have a situation where I would like to monitor all memory allocation and de-allocation, something like the following:

Code:

void  operator delete(void *p)
{
    cout << "Number of bytes de-allocated: " << [Number of bytes];
    free(p);
}

//---------------------------------------------------------------------------

void* operator new(size_t s)
{
    cout << "Number of bytes allocated: " << s;
    void* p = malloc(size);
    if (p == 0)
	{
        throw std::bad_alloc();
    }
    return p;
}
//---------------------------------------------------------------------------

void  operator delete[](void *p)
{
    cout << "Number of bytes de-allocated: " << [Number of Bytes];
    free(p);
}

//---------------------------------------------------------------------------

void* operator new[](size_t s)
{
    cout << "Number of bytes allocated: " << s;
    void* p = malloc(size);
    if (p == 0)
	{
        throw std::bad_alloc();
    }

    return p;
}
//---------------------------------------------------------------------------



int main()
{
    const int s = 5;
    int* p = new int [s];
    delete [] p;

    return 0;
}

Can anyone tell me if it is at all possible to obtain the size of the block of memory to be freed?

Please excuse any typos or anything, I typed this straight into the board. I'm sure my intentions are quite clear.

Thank you.

Well there is no standard way, so you'd need to dig around in the documentation for your compiler.

Or create your own list/array/tree/hash/whatever containing

Code:

struct alloc_info {
  size_t size;
  void *mem;
};

Then when you free memory, you have chance to search for a pointer and retrieve its size.