33 static bool queue_is_empty(struct ring_buf *rb)  in queue_is_empty()  argument
39 	if (rb->tail != rb->head) {  in queue_is_empty()
53 static int queue_get(struct ring_buf *rb, void **mem_block, size_t *size)  in queue_get()  argument
59 	if (queue_is_empty(rb) == true) {  in queue_get()
64 	*mem_block = rb->buf[rb->tail].mem_block;  in queue_get()
65 	*size = rb->buf[rb->tail].size;  in queue_get()
66 	MODULO_INC(rb->tail, rb->len);  in queue_get()
76 static int queue_put(struct ring_buf *rb, void *mem_block, size_t size)  in queue_put()  argument
83 	head_next = rb->head;  in queue_put()
84 	MODULO_INC(head_next, rb->len);  in queue_put()
86 	if (head_next == rb->tail) {  in queue_put()
92 	rb->buf[rb->head].mem_block = mem_block;  in queue_put()
93 	rb->buf[rb->head].size = size;  in queue_put()
94 	rb->head = head_next;  in queue_put()