1 /* mtest.c - memory-mapped database tester/toy */
3 * Copyright 2011 Howard Chu, Symas Corp.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted only as authorized by the OpenLDAP
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>.
14 #define _XOPEN_SOURCE 500 /* srandom(), random() */
20 int main(int argc,char * argv[])
35 count = (random()%384) + 64;
36 values = (int *)malloc(count*sizeof(int));
38 for(i = 0;i<count;i++) {
39 values[i] = random()%1024;
42 rc = mdbenv_create(&env);
43 rc = mdbenv_set_mapsize(env, 10485760);
44 rc = mdbenv_set_maxdbs(env, 4);
45 rc = mdbenv_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664);
46 rc = mdb_txn_begin(env, 0, &txn);
47 rc = mdb_open(txn, "id1", MDB_CREATE, &dbi);
49 key.mv_size = sizeof(int);
51 data.mv_size = sizeof(sval);
54 printf("Adding %d values\n", count);
55 for (i=0;i<count;i++) {
56 sprintf(sval, "%03x %d foo bar", values[i], values[i]);
57 rc = mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE);
60 if (j) printf("%d duplicates skipped\n", j);
61 rc = mdb_txn_commit(txn);
62 rc = mdbenv_stat(env, &mst);
64 rc = mdb_txn_begin(env, 1, &txn);
65 rc = mdb_cursor_open(txn, dbi, &cursor);
66 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
67 printf("key: %p %.*s, data: %p %.*s\n",
68 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
69 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
71 mdb_cursor_close(cursor);
76 for (i= count - 1; i > -1; i-= (random()%5)) {
79 rc = mdb_txn_begin(env, 0, &txn);
80 sprintf(sval, "%03x ", values[i]);
81 rc = mdb_del(txn, dbi, &key, NULL, 0);
86 rc = mdb_txn_commit(txn);
90 printf("Deleted %d values\n", j);
92 rc = mdbenv_stat(env, &mst);
93 rc = mdb_txn_begin(env, 1, &txn);
94 rc = mdb_cursor_open(txn, dbi, &cursor);
95 printf("Cursor next\n");
96 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
97 printf("key: %.*s, data: %.*s\n",
98 (int) key.mv_size, (char *) key.mv_data,
99 (int) data.mv_size, (char *) data.mv_data);
101 printf("Cursor prev\n");
102 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
103 printf("key: %.*s, data: %.*s\n",
104 (int) key.mv_size, (char *) key.mv_data,
105 (int) data.mv_size, (char *) data.mv_data);
107 mdb_cursor_close(cursor);