sds_queue - Man Page

struct _sds_queue_node * head
struct _sds_queue_node * tail
void(* value_free_fn )(void *value)

The pointer to the current active head node​. This is the "next" node that will be dequeued and acted upon during the dequeue (pop) operation​.

The tail of the queue​. This is the "last" value that was inserted​.

If there are remaining nodes when the queue is destroyed, the queue will be drained and this free function called on the value of within​.