1/* mtest.c - memory-mapped database tester/toy */
2/*
3 * Copyright 2011-2018 Howard Chu, Symas Corp.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted only as authorized by the OpenLDAP
8 * Public License.
9 *
10 * A copy of this license is available in the file LICENSE in the
11 * top-level directory of the distribution or, alternatively, at
12 * <http://www.OpenLDAP.org/license.html>.
13 */
14#include <stdio.h>
15#include <stdlib.h>
16#include <time.h>
17#include "lmdb.h"
18
19#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
20#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
21#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
22 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
23
24int main(int argc,char * argv[])
25{
26 int i = 0, j = 0, rc;
27 MDB_env *env;
28 MDB_dbi dbi;
29 MDB_val key, data;
30 MDB_txn *txn;
31 MDB_stat mst;
32 MDB_cursor *cursor, *cur2;
33 MDB_cursor_op op;
34 int count;
35 int *values;
36 char sval[32] = "";
37
38 srand(time(NULL));
39
40 count = (rand()%384) + 64;
41 values = (int *)malloc(count*sizeof(int));
42
43 for(i = 0;i<count;i++) {
44 values[i] = rand()%1024;
45 }
46
47 E(mdb_env_create(&env));
48 E(mdb_env_set_maxreaders(env, 1));
49 E(mdb_env_set_mapsize(env, 10485760));
50 E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP /*|MDB_NOSYNC*/, 0664));
51
52 E(mdb_txn_begin(env, NULL, 0, &txn));
53 E(mdb_dbi_open(txn, NULL, 0, &dbi));
54
55 key.mv_size = sizeof(int);
56 key.mv_data = sval;
57
58 printf("Adding %d values\n", count);
59 for (i=0;i<count;i++) {
60 sprintf(sval, "%03x %d foo bar", values[i], values[i]);
61 /* Set <data> in each iteration, since MDB_NOOVERWRITE may modify it */
62 data.mv_size = sizeof(sval);
63 data.mv_data = sval;
64 if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) {
65 j++;
66 data.mv_size = sizeof(sval);
67 data.mv_data = sval;
68 }
69 }
70 if (j) printf("%d duplicates skipped\n", j);
71 E(mdb_txn_commit(txn));
72 E(mdb_env_stat(env, &mst));
73
74 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
75 E(mdb_cursor_open(txn, dbi, &cursor));
76 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
77 printf("key: %p %.*s, data: %p %.*s\n",
78 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
79 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
80 }
81 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
82 mdb_cursor_close(cursor);
83 mdb_txn_abort(txn);
84
85 j=0;
86 key.mv_data = sval;
87 for (i= count - 1; i > -1; i-= (rand()%5)) {
88 j++;
89 txn=NULL;
90 E(mdb_txn_begin(env, NULL, 0, &txn));
91 sprintf(sval, "%03x ", values[i]);
92 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) {
93 j--;
94 mdb_txn_abort(txn);
95 } else {
96 E(mdb_txn_commit(txn));
97 }
98 }
99 free(values);
100 printf("Deleted %d values\n", j);
101
102 E(mdb_env_stat(env, &mst));
103 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
104 E(mdb_cursor_open(txn, dbi, &cursor));
105 printf("Cursor next\n");
106 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
107 printf("key: %.*s, data: %.*s\n",
108 (int) key.mv_size, (char *) key.mv_data,
109 (int) data.mv_size, (char *) data.mv_data);
110 }
111 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
112 printf("Cursor last\n");
113 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
114 printf("key: %.*s, data: %.*s\n",
115 (int) key.mv_size, (char *) key.mv_data,
116 (int) data.mv_size, (char *) data.mv_data);
117 printf("Cursor prev\n");
118 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
119 printf("key: %.*s, data: %.*s\n",
120 (int) key.mv_size, (char *) key.mv_data,
121 (int) data.mv_size, (char *) data.mv_data);
122 }
123 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
124 printf("Cursor last/prev\n");
125 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
126 printf("key: %.*s, data: %.*s\n",
127 (int) key.mv_size, (char *) key.mv_data,
128 (int) data.mv_size, (char *) data.mv_data);
129 E(mdb_cursor_get(cursor, &key, &data, MDB_PREV));
130 printf("key: %.*s, data: %.*s\n",
131 (int) key.mv_size, (char *) key.mv_data,
132 (int) data.mv_size, (char *) data.mv_data);
133
134 mdb_cursor_close(cursor);
135 mdb_txn_abort(txn);
136
137 printf("Deleting with cursor\n");
138 E(mdb_txn_begin(env, NULL, 0, &txn));
139 E(mdb_cursor_open(txn, dbi, &cur2));
140 for (i=0; i<50; i++) {
141 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, MDB_NEXT)))
142 break;
143 printf("key: %p %.*s, data: %p %.*s\n",
144 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
145 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
146 E(mdb_del(txn, dbi, &key, NULL));
147 }
148
149 printf("Restarting cursor in txn\n");
150 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
151 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, op)))
152 break;
153 printf("key: %p %.*s, data: %p %.*s\n",
154 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
155 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
156 }
157 mdb_cursor_close(cur2);
158 E(mdb_txn_commit(txn));
159
160 printf("Restarting cursor outside txn\n");
161 E(mdb_txn_begin(env, NULL, 0, &txn));
162 E(mdb_cursor_open(txn, dbi, &cursor));
163 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
164 if (RES(MDB_NOTFOUND, mdb_cursor_get(cursor, &key, &data, op)))
165 break;
166 printf("key: %p %.*s, data: %p %.*s\n",
167 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
168 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
169 }
170 mdb_cursor_close(cursor);
171 mdb_txn_abort(txn);
172
173 mdb_dbi_close(env, dbi);
174 mdb_env_close(env);
175
176 return 0;
177}
178