2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj/*
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * CDDL HEADER START
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj *
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * The contents of this file are subject to the terms of the
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * Common Development and Distribution License (the "License").
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * You may not use this file except in compliance with the License.
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj *
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * or http://www.opensolaris.org/os/licensing.
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * See the License for the specific language governing permissions
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * and limitations under the License.
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj *
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2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj */
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj/*
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * Use is subject to license terms.
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj */
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj#pragma ident "%Z%%M% %I% %E% SMI"
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj/*
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * Embedded Linked Lists
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj *
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * Simple doubly-linked list implementation. This implementation assumes that
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * each list element contains an embedded ipmi_list_t (previous and next
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * pointers), which is typically the first member of the element struct.
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * An additional ipmi_list_t is used to store the head (l_next) and tail
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * (l_prev) pointers. The current head and tail list elements have their
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj * previous and next pointers set to NULL, respectively.
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj */
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj#include <assert.h>
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj#include <ipmi_impl.h>
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjvoid
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjipmi_list_append(ipmi_list_t *lp, void *new)
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj{
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *p = lp->l_prev; /* p = tail list element */
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *q = new; /* q = new list element */
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj lp->l_prev = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_prev = p;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_next = NULL;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj if (p != NULL) {
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj assert(p->l_next == NULL);
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj p->l_next = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj } else {
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj assert(lp->l_next == NULL);
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj lp->l_next = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj }
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj}
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjvoid
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjipmi_list_prepend(ipmi_list_t *lp, void *new)
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj{
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *p = new; /* p = new list element */
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *q = lp->l_next; /* q = head list element */
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj lp->l_next = p;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj p->l_prev = NULL;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj p->l_next = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj if (q != NULL) {
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj assert(q->l_prev == NULL);
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_prev = p;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj } else {
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj assert(lp->l_prev == NULL);
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj lp->l_prev = p;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj }
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj}
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjvoid
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjipmi_list_insert_before(ipmi_list_t *lp, void *before_me, void *new)
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj{
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *p = before_me;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *q = new;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj if (p == NULL || p->l_prev == NULL) {
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_prepend(lp, new);
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj return;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj }
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_prev = p->l_prev;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_next = p;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj p->l_prev = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_prev->l_next = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj}
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjvoid
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjipmi_list_insert_after(ipmi_list_t *lp, void *after_me, void *new)
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj{
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *p = after_me;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *q = new;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj if (p == NULL || p->l_next == NULL) {
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_append(lp, new);
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj return;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj }
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_next = p->l_next;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_prev = p;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj p->l_next = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj q->l_next->l_prev = q;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj}
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjvoid
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robjipmi_list_delete(ipmi_list_t *lp, void *existing)
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj{
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj ipmi_list_t *p = existing;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj if (p->l_prev != NULL)
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj p->l_prev->l_next = p->l_next;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj else
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj lp->l_next = p->l_next;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj if (p->l_next != NULL)
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj p->l_next->l_prev = p->l_prev;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj else
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj lp->l_prev = p->l_prev;
2eeaed14a5e2ed9bd811643ad5bffc3510ca0310robj}