1 /* mtest.c - memory-mapped database tester/toy */
3 * Copyright 2011-2015 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>.
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()))
24 int main(int argc,char * argv[])
32 MDB_cursor *cursor, *cur2;
40 count = (rand()%384) + 64;
41 values = (int *)malloc(count*sizeof(int));
43 for(i = 0;i<count;i++) {
44 values[i] = rand()%1024;
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));
52 E(mdb_txn_begin(env, NULL, 0, &txn));
53 E(mdb_dbi_open(txn, NULL, 0, &dbi));
55 key.mv_size = sizeof(int);
57 data.mv_size = sizeof(sval);
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 if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) {
65 data.mv_size = sizeof(sval);
69 if (j) printf("%d duplicates skipped\n", j);
70 E(mdb_txn_commit(txn));
71 E(mdb_env_stat(env, &mst));
73 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
74 E(mdb_cursor_open(txn, dbi, &cursor));
75 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
76 printf("key: %p %.*s, data: %p %.*s\n",
77 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
78 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
80 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
81 mdb_cursor_close(cursor);
86 for (i= count - 1; i > -1; i-= (rand()%5)) {
89 E(mdb_txn_begin(env, NULL, 0, &txn));
90 sprintf(sval, "%03x ", values[i]);
91 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) {
95 E(mdb_txn_commit(txn));
99 printf("Deleted %d values\n", j);
101 E(mdb_env_stat(env, &mst));
102 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
103 E(mdb_cursor_open(txn, dbi, &cursor));
104 printf("Cursor next\n");
105 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
106 printf("key: %.*s, data: %.*s\n",
107 (int) key.mv_size, (char *) key.mv_data,
108 (int) data.mv_size, (char *) data.mv_data);
110 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
111 printf("Cursor last\n");
112 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
113 printf("key: %.*s, data: %.*s\n",
114 (int) key.mv_size, (char *) key.mv_data,
115 (int) data.mv_size, (char *) data.mv_data);
116 printf("Cursor prev\n");
117 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
118 printf("key: %.*s, data: %.*s\n",
119 (int) key.mv_size, (char *) key.mv_data,
120 (int) data.mv_size, (char *) data.mv_data);
122 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
123 printf("Cursor last/prev\n");
124 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
125 printf("key: %.*s, data: %.*s\n",
126 (int) key.mv_size, (char *) key.mv_data,
127 (int) data.mv_size, (char *) data.mv_data);
128 E(mdb_cursor_get(cursor, &key, &data, MDB_PREV));
129 printf("key: %.*s, data: %.*s\n",
130 (int) key.mv_size, (char *) key.mv_data,
131 (int) data.mv_size, (char *) data.mv_data);
135 printf("Deleting with cursor\n");
136 E(mdb_txn_begin(env, NULL, 0, &txn));
137 E(mdb_cursor_open(txn, dbi, &cur2));
138 for (i=0; i<50; i++) {
139 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, MDB_NEXT)))
141 printf("key: %p %.*s, data: %p %.*s\n",
142 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
143 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
144 E(mdb_del(txn, dbi, &key, NULL));
147 printf("Restarting cursor in txn\n");
148 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
149 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, op)))
151 printf("key: %p %.*s, data: %p %.*s\n",
152 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
153 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
155 mdb_cursor_close(cur2);
156 E(mdb_txn_commit(txn));
158 printf("Restarting cursor outside txn\n");
159 E(mdb_txn_begin(env, NULL, 0, &txn));
160 E(mdb_cursor_open(txn, dbi, &cursor));
161 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
162 if (RES(MDB_NOTFOUND, mdb_cursor_get(cursor, &key, &data, op)))
164 printf("key: %p %.*s, data: %p %.*s\n",
165 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
166 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
168 mdb_cursor_close(cursor);
171 mdb_dbi_close(env, dbi);