How to check if a variable is freed or not?

[ycinar]

I wonder if anyone could suggest on how to check if a varible is already freed or not in C++? Something like this:

if(variablenane != free)
{
//do something
}

sure this syntax doesnt work... I would appreciate any help on this.

Thanks

[gpraghuram]

I wonder if anyone could suggest on how to check if a varible is already freed or not in C++? Something like this:

if(variablenane != free)
{
//do something
}

sure this syntax doesnt work... I would appreciate any help on this.

Thanks

I dont think something of that sort is available

Raghuram

[ycinar]

maybe i should make some clarifications

say you free a varible (maybe a pointer) time to time like this

free (varibaleName)

then you want to take action in another function depending on if that varible is freed or not? I would imagine someway or another it should be possible to do this check?

[weaknessforcats]

There is no way to tell if a variable has been deleted.

Usually, you set the deleted pointer to zero. But you have to make sure that there are no other copies of that address in the program. Big problem in C.

In C++ you use a Handle object rather than an actual pointer. See the article on Handle classes in the C/C++ articles forum.