1 /* mtest2.c - memory-mapped database tester/toy */
2 /*
3 * Copyright 2011-2017 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
15 /* Just like mtest.c, but using a subDB instead of the main DB */
16
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <time.h>
20 #include "lmdb.h"
21
22 #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
23 #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
24 #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
25 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
26
main(int argc,char * argv[])27 int main(int argc,char * argv[])
28 {
29 int i = 0, j = 0, rc;
30 MDB_env *env;
31 MDB_dbi dbi;
32 MDB_val key, data;
33 MDB_txn *txn;
34 MDB_stat mst;
35 MDB_cursor *cursor;
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_set_maxdbs(env, 4));
53 E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664));
54
55 E(mdb_txn_begin(env, NULL, 0, &txn));
56 E(mdb_dbi_open(txn, "id1", MDB_CREATE, &dbi));
57
58 key.mv_size = sizeof(int);
59 key.mv_data = sval;
60
61 printf("Adding %d values\n", count);
62 for (i=0;i<count;i++) {
63 sprintf(sval, "%03x %d foo bar", values[i], values[i]);
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 }
69 if (j) printf("%d duplicates skipped\n", j);
70 E(mdb_txn_commit(txn));
71 E(mdb_env_stat(env, &mst));
72
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);
79 }
80 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
81 mdb_cursor_close(cursor);
82 mdb_txn_abort(txn);
83
84 j=0;
85 key.mv_data = sval;
86 for (i= count - 1; i > -1; i-= (rand()%5)) {
87 j++;
88 txn=NULL;
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))) {
92 j--;
93 mdb_txn_abort(txn);
94 } else {
95 E(mdb_txn_commit(txn));
96 }
97 }
98 free(values);
99 printf("Deleted %d values\n", j);
100
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);
109 }
110 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
111 printf("Cursor prev\n");
112 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
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 }
117 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
118 mdb_cursor_close(cursor);
119 mdb_txn_abort(txn);
120
121 mdb_dbi_close(env, dbi);
122 mdb_env_close(env);
123 return 0;
124 }
125