1/*	$NetBSD: idl.h,v 1.2 2021/08/14 16:15:02 christos Exp $	*/
2
3/* OpenLDAP WiredTiger backend */
4/* $OpenLDAP$ */
5/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
6 *
7 * Copyright 2002-2021 The OpenLDAP Foundation.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted only as authorized by the OpenLDAP
12 * Public License.
13 *
14 * A copy of this license is available in the file LICENSE in the
15 * top-level directory of the distribution or, alternatively, at
16 * <http://www.OpenLDAP.org/license.html>.
17 */
18/* ACKNOWLEDGEMENTS:
19 * This work was developed by HAMANO Tsukasa <hamano@osstech.co.jp>
20 * based on back-bdb for inclusion in OpenLDAP Software.
21 * WiredTiger is a product of MongoDB Inc.
22 */
23
24#ifndef _WI_IDL_H_
25#define _WT_IDL_H_
26
27/* IDL sizes - likely should be even bigger
28 *   limiting factors: sizeof(ID), thread stack size
29 */
30#define	WT_IDL_LOGN	16	/* DB_SIZE is 2^16, UM_SIZE is 2^17 */
31#define WT_IDL_DB_SIZE		(1<<WT_IDL_LOGN)
32#define WT_IDL_UM_SIZE		(1<<(WT_IDL_LOGN+1))
33#define WT_IDL_UM_SIZEOF	(WT_IDL_UM_SIZE * sizeof(ID))
34
35#define WT_IDL_DB_MAX		(WT_IDL_DB_SIZE-1)
36
37#define WT_IDL_UM_MAX		(WT_IDL_UM_SIZE-1)
38
39#define WT_IDL_IS_RANGE(ids)	((ids)[0] == NOID)
40#define WT_IDL_RANGE_SIZE		(3)
41#define WT_IDL_RANGE_SIZEOF	(WT_IDL_RANGE_SIZE * sizeof(ID))
42#define WT_IDL_SIZEOF(ids)		((WT_IDL_IS_RANGE(ids) \
43	? WT_IDL_RANGE_SIZE : ((ids)[0]+1)) * sizeof(ID))
44
45#define WT_IDL_RANGE_FIRST(ids)	((ids)[1])
46#define WT_IDL_RANGE_LAST(ids)		((ids)[2])
47
48#define WT_IDL_RANGE( ids, f, l ) \
49	do { \
50		(ids)[0] = NOID; \
51		(ids)[1] = (f);  \
52		(ids)[2] = (l);  \
53	} while(0)
54
55#define WT_IDL_ZERO(ids) \
56	do { \
57		(ids)[0] = 0; \
58		(ids)[1] = 0; \
59		(ids)[2] = 0; \
60	} while(0)
61
62#define WT_IDL_IS_ZERO(ids) ( (ids)[0] == 0 )
63#define WT_IDL_IS_ALL( range, ids ) ( (ids)[0] == NOID \
64	&& (ids)[1] <= (range)[1] && (range)[2] <= (ids)[2] )
65
66#define WT_IDL_CPY( dst, src ) (AC_MEMCPY( dst, src, WT_IDL_SIZEOF( src ) ))
67
68#define WT_IDL_ID( wi, ids, id ) WT_IDL_RANGE( ids, id, ((wi)->wi_lastid) )
69#define WT_IDL_ALL( wi, ids ) WT_IDL_RANGE( ids, 1, ((wi)->wi_lastid) )
70
71#define WT_IDL_FIRST( ids )	( (ids)[1] )
72#define WT_IDL_LLAST( ids )	( (ids)[(ids)[0]] )
73#define WT_IDL_LAST( ids )		( WT_IDL_IS_RANGE(ids) \
74	? (ids)[2] : (ids)[(ids)[0]] )
75
76#define WT_IDL_N( ids )		( WT_IDL_IS_RANGE(ids) \
77	? ((ids)[2]-(ids)[1])+1 : (ids)[0] )
78
79LDAP_BEGIN_DECL
80LDAP_END_DECL
81
82#endif
83