1 /* $NetBSD: mtest.c,v 1.3 2021/08/14 16:14:57 christos Exp $ */
2
3 /* mtest.c - memory-mapped database tester/toy */
4 /*
5 * Copyright 2011-2021 Howard Chu, Symas Corp.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <time.h>
19 #include "lmdb.h"
20
21 #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
22 #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
23 #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
24 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
25
main(int argc,char * argv[])26 int main(int argc,char * argv[])
27 {
28 int i = 0, j = 0, rc;
29 MDB_env *env;
30 MDB_dbi dbi;
31 MDB_val key, data;
32 MDB_txn *txn;
33 MDB_stat mst;
34 MDB_cursor *cursor, *cur2;
35 MDB_cursor_op op;
36 int count;
37 int *values;
38 char sval[32] = "";
39
40 srand(time(NULL));
41
42 count = (rand()%384) + 64;
43 values = (int *)malloc(count*sizeof(int));
44
45 for(i = 0;i<count;i++) {
46 values[i] = rand()%1024;
47 }
48
49 E(mdb_env_create(&env));
50 E(mdb_env_set_maxreaders(env, 1));
51 E(mdb_env_set_mapsize(env, 10485760));
52 E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP /*|MDB_NOSYNC*/, 0664));
53
54 E(mdb_txn_begin(env, NULL, 0, &txn));
55 E(mdb_dbi_open(txn, NULL, 0, &dbi));
56
57 key.mv_size = sizeof(int);
58 key.mv_data = sval;
59
60 printf("Adding %d values\n", count);
61 for (i=0;i<count;i++) {
62 sprintf(sval, "%03x %d foo bar", values[i], values[i]);
63 /* Set <data> in each iteration, since MDB_NOOVERWRITE may modify it */
64 data.mv_size = sizeof(sval);
65 data.mv_data = sval;
66 if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) {
67 j++;
68 data.mv_size = sizeof(sval);
69 data.mv_data = sval;
70 }
71 }
72 if (j) printf("%d duplicates skipped\n", j);
73 E(mdb_txn_commit(txn));
74 E(mdb_env_stat(env, &mst));
75
76 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
77 E(mdb_cursor_open(txn, dbi, &cursor));
78 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
79 printf("key: %p %.*s, data: %p %.*s\n",
80 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
81 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
82 }
83 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
84 mdb_cursor_close(cursor);
85 mdb_txn_abort(txn);
86
87 j=0;
88 key.mv_data = sval;
89 for (i= count - 1; i > -1; i-= (rand()%5)) {
90 j++;
91 txn=NULL;
92 E(mdb_txn_begin(env, NULL, 0, &txn));
93 sprintf(sval, "%03x ", values[i]);
94 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) {
95 j--;
96 mdb_txn_abort(txn);
97 } else {
98 E(mdb_txn_commit(txn));
99 }
100 }
101 free(values);
102 printf("Deleted %d values\n", j);
103
104 E(mdb_env_stat(env, &mst));
105 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
106 E(mdb_cursor_open(txn, dbi, &cursor));
107 printf("Cursor next\n");
108 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
109 printf("key: %.*s, data: %.*s\n",
110 (int) key.mv_size, (char *) key.mv_data,
111 (int) data.mv_size, (char *) data.mv_data);
112 }
113 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
114 printf("Cursor last\n");
115 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
116 printf("key: %.*s, data: %.*s\n",
117 (int) key.mv_size, (char *) key.mv_data,
118 (int) data.mv_size, (char *) data.mv_data);
119 printf("Cursor prev\n");
120 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
121 printf("key: %.*s, data: %.*s\n",
122 (int) key.mv_size, (char *) key.mv_data,
123 (int) data.mv_size, (char *) data.mv_data);
124 }
125 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
126 printf("Cursor last/prev\n");
127 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
128 printf("key: %.*s, data: %.*s\n",
129 (int) key.mv_size, (char *) key.mv_data,
130 (int) data.mv_size, (char *) data.mv_data);
131 E(mdb_cursor_get(cursor, &key, &data, MDB_PREV));
132 printf("key: %.*s, data: %.*s\n",
133 (int) key.mv_size, (char *) key.mv_data,
134 (int) data.mv_size, (char *) data.mv_data);
135
136 mdb_cursor_close(cursor);
137 mdb_txn_abort(txn);
138
139 printf("Deleting with cursor\n");
140 E(mdb_txn_begin(env, NULL, 0, &txn));
141 E(mdb_cursor_open(txn, dbi, &cur2));
142 for (i=0; i<50; i++) {
143 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, MDB_NEXT)))
144 break;
145 printf("key: %p %.*s, data: %p %.*s\n",
146 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
147 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
148 E(mdb_del(txn, dbi, &key, NULL));
149 }
150
151 printf("Restarting cursor in txn\n");
152 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
153 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, op)))
154 break;
155 printf("key: %p %.*s, data: %p %.*s\n",
156 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
157 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
158 }
159 mdb_cursor_close(cur2);
160 E(mdb_txn_commit(txn));
161
162 printf("Restarting cursor outside txn\n");
163 E(mdb_txn_begin(env, NULL, 0, &txn));
164 E(mdb_cursor_open(txn, dbi, &cursor));
165 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
166 if (RES(MDB_NOTFOUND, mdb_cursor_get(cursor, &key, &data, op)))
167 break;
168 printf("key: %p %.*s, data: %p %.*s\n",
169 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
170 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
171 }
172 mdb_cursor_close(cursor);
173 mdb_txn_abort(txn);
174
175 mdb_dbi_close(env, dbi);
176 mdb_env_close(env);
177
178 return 0;
179 }
180