Re: new(nothrow not even from constructor)

On Dec 19, 12:14 pm, "Bo Persson" <b...@gmb.dk> wrote:


    Some of the objects I create are quite complicated in their
construction. For instance, if I create a thread object for sniffing a
network interface, it could fail for all sorts of reasons... lack of
memory, inability to open the network interface. If creation of the
object fails, I want to handle it gracefully without killing my
program.

Here's what I've resorted to doing:

#define NEW_NULL_FAIL(p,x) \
do \
{ \
    try \
    { \
        p = new(std::nothrow) x; \
    } \
    catch (...) \
    { \
        p = 0; \
    } \
} while (0)

So now my code is something like:

    Thread *p;

    NEW_NULL_FAIL(p, Thread(entry_func,JOINABLE));

    if (!p)
    {
        wxMessageBox(...
        return;
    }

    ContinueOn();