Re: Fixing new for VC6- on project-local basis

Tamas Demjen <>
Fri, 02 Jun 2006 15:58:40 -0700
ultranet wrote:

Actually, this has to be a macro to avoid infinite recursion.

In this case my recommendation would be to use malloc and free:

void *__cdecl operator new(size_t size)
     void *p = malloc(size);
     if ( p == NULL) {
        // TODO: log it
        throw bad_alloc();
     return p;

void *__cdecl operator new(size_t size, const std::nothrow_t&)
     void *p;
         p = malloc(size);
     catch (std::bad_alloc &)
         p = NULL;
        // TODO: log it
     return p;

void __cdecl operator delete(void *p)

Hope this helps your recursion problem.

One more thing. You were trying to catch the std::bad_alloc by value.
I'm not so sure it's a good idea. Generally speaking, catching
exceptions by value can lead to type truncation and unnecessary copying
of the exception object. That being said, I'd catch it by reference, so
I modified that line accordingly:

catch (std::bad_alloc &)

Finally, I've removed the exception specifiers, mainly because most C++
experts advice against it. It's up to you, but IMHO it gives a false
sense of security with quite a bit of a performance penalty. I'm not
familiar how Microsoft handles throw(), but the standard behavior is
pretty awful.


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