Singleton Class

[Kumar Saurabh]

Hi,

I am using a singleton class like the one given below:

class singleton
{
static singleton *object;
singleton();

public:
getInstance();
~singleton();
};


From some other function i try to do the following:

singleton *p= singleton :: getInstance();
detele p;


But here my program dumps. What could be the problem.

Thanks and Regards,
Saurabh

 

[Ben Pope]

Hi,

I am using a singleton class like the one given below:

class singleton
{
static singleton *object;

// Where is the singleton allocated?

singleton();

public:
getInstance();

// What does this return?

~singleton();
};


From some other function i try to do the following:

singleton *p= singleton :: getInstance();
detele p;

The singleton object should deal with it's own lifetime, why are you
trying to delete it?

But here my program dumps. What could be the problem.

I think you need to re-read that chapter of your book, or get a better book.

Ben Pope

 

[Rolf Magnus]

Hi,

I am using a singleton class like the one given below:

class singleton
{
static singleton *object;
singleton();

public:
getInstance();
~singleton();
};


From some other function i try to do the following:

singleton *p= singleton :: getInstance();
detele p;


But here my program dumps. What could be the problem.

That depends on the implementation the getInstance() function.

 

[Dave Townsend]

Hi,

I am using a singleton class like the one given below:

class singleton
{
static singleton *object;
singleton();

public:
getInstance();
~singleton();
};


From some other function i try to do the following:

singleton *p= singleton :: getInstance();
detele p;


But here my program dumps. What could be the problem.

Thanks and Regards,
Saurabh

If you program craps out deleting p, then p is bad, either its not
initialized
or you've already deleted it or perhaps its pointing to something which is
not allocated ( like a static object ). Post the entire listing of your
code.

 

[Jaspreet]

Hi,

I am using a singleton class like the one given below:

class singleton
{
static singleton *object;
singleton();

public:
getInstance();
~singleton();
};


From some other function i try to do the following:

singleton *p= singleton :: getInstance();
detele p;


But here my program dumps. What could be the problem.

Thanks and Regards,
Saurabh

Could we have the code please ? Did you intialise object ? Remember it
is static and you need to intialise/allocate it outside your class
declaration.

 

[shankha]

it would be nice if you can get us the code .. Have gdb running on your
executable it would tell you how it is happening ..(PRINT p's address
every time )