Thread: free function

Originally Posted by vapanchamukhi

does a content of a pointer is zero after freeing that pointer???

No, not in and of itself. It is customary to set the pointer to NULL (zero) when freeing it, but there is no automatic way that this is done. I have occassionally suggested a function like this:

Code:

void freeAndNull(void **p)
{
    if(p)    // It is possible that someone by mistake is passing NULL as the parameter to freeAndNull... 
    {
       free(*p);
       *p = NULL;
    }
}

// And an example call:
   char * p = malloc(...);
   
    ...
    freeAndNull(&p);
...

--
Mats