1 /* $NetBSD: mtest6.c,v 1.3 2021/08/14 16:14:57 christos Exp $ */
2
3 /* mtest6.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
17 /* Tests for DB splits and merges */
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <string.h>
21 #include <time.h>
22 #include "lmdb.h"
23
24 #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
25 #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
26 #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
27 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
28
29 char dkbuf[1024];
30
main(int argc,char * argv[])31 int main(int argc,char * argv[])
32 {
33 int i = 0, j = 0, rc;
34 MDB_env *env;
35 MDB_dbi dbi;
36 MDB_val key, data, sdata;
37 MDB_txn *txn;
38 MDB_stat mst;
39 MDB_cursor *cursor;
40 int count;
41 int *values;
42 long kval;
43 char *sval;
44
45 srand(time(NULL));
46
47 E(mdb_env_create(&env));
48 E(mdb_env_set_mapsize(env, 10485760));
49 E(mdb_env_set_maxdbs(env, 4));
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, "id6", MDB_CREATE|MDB_INTEGERKEY, &dbi));
54 E(mdb_cursor_open(txn, dbi, &cursor));
55 E(mdb_stat(txn, dbi, &mst));
56
57 sval = calloc(1, mst.ms_psize / 4);
58 key.mv_size = sizeof(long);
59 key.mv_data = &kval;
60 sdata.mv_size = mst.ms_psize / 4 - 30;
61 sdata.mv_data = sval;
62
63 printf("Adding 12 values, should yield 3 splits\n");
64 for (i=0;i<12;i++) {
65 kval = i*5;
66 sprintf(sval, "%08x", kval);
67 data = sdata;
68 (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
69 }
70 printf("Adding 12 more values, should yield 3 splits\n");
71 for (i=0;i<12;i++) {
72 kval = i*5+4;
73 sprintf(sval, "%08x", kval);
74 data = sdata;
75 (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
76 }
77 printf("Adding 12 more values, should yield 3 splits\n");
78 for (i=0;i<12;i++) {
79 kval = i*5+1;
80 sprintf(sval, "%08x", kval);
81 data = sdata;
82 (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
83 }
84 E(mdb_cursor_get(cursor, &key, &data, MDB_FIRST));
85
86 do {
87 printf("key: %p %s, data: %p %.*s\n",
88 key.mv_data, mdb_dkey(&key, dkbuf),
89 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
90 } while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0);
91 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
92 mdb_cursor_close(cursor);
93 mdb_txn_commit(txn);
94
95 #if 0
96 j=0;
97
98 for (i= count - 1; i > -1; i-= (rand()%5)) {
99 j++;
100 txn=NULL;
101 E(mdb_txn_begin(env, NULL, 0, &txn));
102 sprintf(kval, "%03x", values[i & ~0x0f]);
103 sprintf(sval, "%03x %d foo bar", values[i], values[i]);
104 key.mv_size = sizeof(int);
105 key.mv_data = kval;
106 data.mv_size = sizeof(sval);
107 data.mv_data = sval;
108 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) {
109 j--;
110 mdb_txn_abort(txn);
111 } else {
112 E(mdb_txn_commit(txn));
113 }
114 }
115 free(values);
116 printf("Deleted %d values\n", j);
117
118 E(mdb_env_stat(env, &mst));
119 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
120 E(mdb_cursor_open(txn, dbi, &cursor));
121 printf("Cursor next\n");
122 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
123 printf("key: %.*s, data: %.*s\n",
124 (int) key.mv_size, (char *) key.mv_data,
125 (int) data.mv_size, (char *) data.mv_data);
126 }
127 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
128 printf("Cursor prev\n");
129 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
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 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
135 mdb_cursor_close(cursor);
136 mdb_txn_abort(txn);
137
138 mdb_dbi_close(env, dbi);
139 #endif
140 mdb_env_close(env);
141
142 return 0;
143 }
144