diff options
Diffstat (limited to 'usr/src/cmd/tnf/prex/queue.c')
-rw-r--r-- | usr/src/cmd/tnf/prex/queue.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/usr/src/cmd/tnf/prex/queue.c b/usr/src/cmd/tnf/prex/queue.c deleted file mode 100644 index c2e6867bce..0000000000 --- a/usr/src/cmd/tnf/prex/queue.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License, Version 1.0 only - * (the "License"). You may not use this file except in compliance - * with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright (c) 1994, by Sun Microsytems, Inc. - */ - -#pragma ident "%Z%%M% %I% %E% SMI" - -/* - * Includes - */ - -#include "queue.h" -#include "new.h" - - -/* - * queue_init() - initializes a queue_node to be unlinked. - */ - -void -queue_init(queue_node_t * q) -{ - q->next_p = q->prev_p = q; - -} /* end queue_init */ - - -/* - * queue_prepend() - prepends a queue_node to another in a list - */ - -queue_node_t * -queue_prepend(queue_node_t * h, queue_node_t * q) -{ - if (!h) - return ((q) ? q : NULL); - - if (q) { - queue_node_t *qtail_p = q->prev_p; - queue_node_t *hnode_p = h->next_p; - - hnode_p->prev_p = qtail_p; - h->next_p = q; - - q->prev_p = h; - qtail_p->next_p = hnode_p; - } - return (h); - -} /* end queue_prepend */ - - -/* - * queue_append() - appends a queue_node to another in a list - */ - -queue_node_t * -queue_append(queue_node_t * h, queue_node_t * q) -{ - if (!h) - return ((q) ? q : NULL); - - if (q) { - queue_node_t *htail_p = h->prev_p; - queue_node_t *qtail_p = q->prev_p; - - h->prev_p = qtail_p; - htail_p->next_p = q; - - q->prev_p = htail_p; - qtail_p->next_p = h; - } - return (h); - -} /* end queue_append */ - - -/* - * queue_remove() - removes a node from a list, returns a pointer to the next - * node in the list. - */ - -queue_node_t * -queue_remove(queue_node_t * q) -{ - queue_node_t *n; - - n = q->next_p; - - if (queue_isempty(q)) - return (NULL); - - q->next_p->prev_p = q->prev_p; - q->prev_p->next_p = q->next_p; - - q->next_p = q->prev_p = q; - - return (n); - -} /* end queue_remove */ - - -/* - * queue_isempty() - */ - -boolean_t -queue_isempty(queue_node_t * q) -{ - return ((q->next_p == q)); - -} /* queue_isempty */ - - -/* - * queue_next() - returns the next element in a queue, or NULL if the - * supplied previous item was the last. - */ - -queue_node_t * -queue_next(queue_node_t * h, queue_node_t * q) -{ - if (!h) - return (NULL); - - if (!q) - return (h); - - if (q->next_p == h) - return (NULL); - - return (q->next_p); - -} /* end queue_next */ |