Custom memory manger operator new

You can add extra parameters to operator new, and then you can store a pointer to the allocator inside the allocation itself so that operator delete can access it:

struct Allocator
{
	int name;
	static void* Alloc( uint size  ) { return malloc(size); }
	static void  Free ( void* data ) { return free(data); }
};
class Myclass
{
	struct Block
	{
		Allocator* a;
	};
public:
	void* operator new(size_t size, Allocator& a)
	{//store the allocator pointer in a header, return the memory after the header
		Block* data = (Block*)a.Alloc(size + sizeof(Block));
		data->a = &a
		return data+1;
	}
	void operator delete(void* memory)
	{//go back a few bytes to find the start of the header
		Block* data = ((Block*)memory)-1;
		data->a->Free( data );
	}
};

Allocator alloc = { 42 };
Myclass* object = new(alloc) Myclass;//extra parameters to new
delete object;

Thanks. That should work perfect.