Re: auto_ptr not dereferencable

From:

Fei Rao <fera_bill@hotmail.com>

Newsgroups:

comp.lang.c++

Date:

Thu, 28 Feb 2008 04:51:51 +0000 (UTC)

Message-ID:

<7c6e25950fd78ca4799b64d8620@news.cn99.com>

Hello online_wan,

Yes, as you mentioned, m_osCom must be initialized before it can be dereferenced.

To supplement you with more details:
std::auto_ptr<osCom> m_osCom;
auto_prt(0) is called when create an object of Communicator is created.

On 2??27??, ????6??21??, mkarja <mka...@gmail.com> wrote:

Hi,

I'm having a bit of a problem with auto_ptr.

Here's a code snippet and some explanation to follow.

Communicator.h
-------- code start --------
typedef OsCommunication osCom;
private:
std::auto_ptr<osCom> m_osCom;
-------- code end --------
Communicator.cpp
-------- code start --------
void Communicator::Initialize(void *ptr)
{
if(ptr != 0)
g_ServerWorker = (ServerWorker*)ptr;
else
try
{
m_osCom->Initialize(this);
}
catch(...)
{
}}
-------- code end --------

There are obviously lots of other stuff on both files, but those are
the essential
parts I think.
The OsCommunication is an abstract class that's why I use typedef and
auto_ptr.
If someone has better idea for that, I'm all ears.
The "m_osCom->Initialize(this);" line is what causes the error when I
debug it.
The error is somthing like this "Debug Assertion Failed, auto_ptr not
dereferencable"
Any help would be greatly appriciated.

----
mkarja

"Debug Assertion Failed, auto_ptr not
dereferencable"
please new one instance and is pointed by auto_ptr.