1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
24 */
25
26 /*
27 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 /*
32 *
33 * MODULE: dapl_pz_util.c
34 *
35 * PURPOSE: Manage PZ structure
36 *
37 * $Id: dapl_pz_util.c,v 1.7 2003/06/13 12:21:11 sjs2 Exp $
38 */
39
40 #include "dapl_pz_util.h"
41 #include "dapl_ia_util.h"
42
43 /*
44 * dapl_pz_alloc
45 *
46 * alloc and initialize an PZ struct
47 *
48 * Input:
49 * none
50 *
51 * Output:
52 * pz_ptr
53 *
54 * Returns:
55 * none
56 *
57 */
58 DAPL_PZ *
dapl_pz_alloc(IN DAPL_IA * ia)59 dapl_pz_alloc(
60 IN DAPL_IA *ia)
61 {
62 DAPL_PZ *pz;
63
64 /* Allocate PZ */
65 pz = (DAPL_PZ *) dapl_os_alloc(sizeof (DAPL_PZ));
66 if (NULL == pz) {
67 return (NULL);
68 }
69
70 /* zero the structure */
71 (void) dapl_os_memzero(pz, sizeof (DAPL_PZ));
72
73 /*
74 * initialize the header
75 */
76 pz->header.provider = ia->header.provider;
77 pz->header.magic = DAPL_MAGIC_PZ;
78 pz->header.handle_type = DAT_HANDLE_TYPE_PZ;
79 pz->header.owner_ia = ia;
80 pz->header.user_context.as_64 = 0;
81 pz->header.user_context.as_ptr = NULL;
82 dapl_llist_init_entry(&pz->header.ia_list_entry);
83 dapl_ia_link_pz(ia, pz);
84 dapl_os_lock_init(&pz->header.lock);
85
86 /*
87 * initialize the body
88 */
89 pz->pz_ref_count = 0;
90
91 return (pz);
92 }
93
94 /*
95 * dapl_pz_dealloc
96 *
97 * free an PZ struct
98 *
99 * Input:
100 * pz_ptr
101 *
102 * Output:
103 * none
104 *
105 * Returns:
106 * none
107 *
108 */
109 void
dapl_pz_dealloc(IN DAPL_PZ * pz)110 dapl_pz_dealloc(
111 IN DAPL_PZ *pz)
112 {
113 /* reset magic to prevent reuse */
114 pz->header.magic = DAPL_MAGIC_INVALID;
115 dapl_ia_unlink_pz(pz->header.owner_ia, pz);
116 dapl_os_lock_destroy(&pz->header.lock);
117
118 dapl_os_free(pz, sizeof (DAPL_PZ));
119 }
120