Thread: Placement new?

OK, so next step is to use placement new. I'm not sure on how to use it. I've never done it before.
I've done a very simple test to get the hang of it:

Code:

void* __cdecl operator new(std::size_t size, LPCSTR strLine, int nLine)
{
	//::operator new(size, strLine, nLine);
	New::CMemoryRange* p = (New::CMemoryRange*)VirtualAlloc(NULL, size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
	new (p) New::CMemoryRange;
	return 0;
}

Initiated by:

Code:

new New::CMemoryRange;

Is this the right way to use placement new? Because all I get is:

Code:

inline void *__CRTDECL operator new(size_t, void *_Where)
        {return (_Where); }

In essence, it does nothing but return the same argument I passed in!

The basic idea here is to allocate memory using VirtualAlloc, then use placement new to actually construct the object, but I'm not sure how to do it.