Daniel P. Berrangé <berra...@redhat.com> writes:
> Both GCC and CLang support a C extension attribute((cleanup)) which
> allows you to define a function that is invoked when a stack variable
> exits scope. This typically used to free the memory allocated to it,
> though you're not restricted to this. For example it could be used to
> unlock a mutex.
<snip>
>
> GOOD:
> g_autofree char *wibble = g_strdup("wibble")
> ...
> return g_steal_pointer(wibble);
>
> g_steal_pointer is an inline function which simply copies
> the pointer to a new variable, and sets the original variable
> to NULL, thus avoiding cleanup.
Surely this is a particular use case where you wouldn't use g_autofree
to declare the variable as you intending to return it to the outer scope?
--
Alex Bennée
