This function existed before g_atomic_int_add() returned the prior value of the integer (which it now does). It is retained only for compatibility reasons. Don't use this function in new code.
a pointer to a #gint
the value to add
Return: the value of @atomic before the add, signed
Deprecated: Use g_atomic_int_add() instead.
2.4
See Implementation
This function existed before g_atomic_int_add() returned the prior value of the integer (which it now does). It is retained only for compatibility reasons. Don't use this function in new code.