Re: Passing Pointers -- where to delete them

From:

James Kanze <james.kanze@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Mon, 3 Mar 2008 02:39:02 -0800 (PST)

Message-ID:

<40804e93-3270-46f3-a24c-e47e86e17db7@i29g2000prf.googlegroups.com>

On Mar 3, 7:24 am, Ian Collins <ian-n...@hotmail.com> wrote:

jason.cipri...@gmail.com wrote:

On Mar 3, 12:37 am, Arv <arvind.b...@gmail.com> wrote:

I got most things clarified now, but I still have a doubt
related to shared_ptr. When I use a singleton object, would
a shared_ptr help?

Not really, because:

Because when I use new inside the singleton's getInstance
method, I am not sure when to delete it, since it is a
static member, i am not sure putting the delete in the
destructor would help. Should I have another method called
resetInstance or something?

Well, if it's a singleton, why would you want to reset it? ;-)

Unit tests - you would want the object reset before each test.

In such cases, I'll use a separate process for each test. It's
a lot closer to the actual use case. But even then, unit tests
for singletons are somewhat difficult. Typically, the singleton
will look like a memory leak, which, of course, causes the test
to fail---you need to take special precautions to avoid this.

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James Kanze (GABI Software) email:james.kanze@gmail.com
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