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92f71f50f9
Initialize unused portions of DB pages, for security or to silence checkers like Purify and Valgrind. Like BDB configure --enable-umrw.
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/* mtest2.c - memory-mapped database tester/toy */
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/*
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* Copyright 2011 Howard Chu, Symas Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* Just like mtest.c, but using a subDB instead of the main DB */
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#define _XOPEN_SOURCE 500 /* srandom(), random() */
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include "lmdb.h"
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int main(int argc,char * argv[])
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{
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int i = 0, j = 0, rc;
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MDB_env *env;
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MDB_dbi dbi;
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MDB_val key, data;
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MDB_txn *txn;
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MDB_stat mst;
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MDB_cursor *cursor;
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int count;
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int *values;
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char sval[32] = "";
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srandom(time(NULL));
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count = (random()%384) + 64;
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values = (int *)malloc(count*sizeof(int));
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for(i = 0;i<count;i++) {
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values[i] = random()%1024;
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}
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rc = mdb_env_create(&env);
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rc = mdb_env_set_mapsize(env, 10485760);
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rc = mdb_env_set_maxdbs(env, 4);
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rc = mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664);
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rc = mdb_txn_begin(env, NULL, 0, &txn);
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rc = mdb_open(txn, "id1", MDB_CREATE, &dbi);
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key.mv_size = sizeof(int);
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key.mv_data = sval;
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data.mv_size = sizeof(sval);
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data.mv_data = sval;
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printf("Adding %d values\n", count);
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for (i=0;i<count;i++) {
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sprintf(sval, "%03x %d foo bar", values[i], values[i]);
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rc = mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE);
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if (rc) j++;
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}
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if (j) printf("%d duplicates skipped\n", j);
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rc = mdb_txn_commit(txn);
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rc = mdb_env_stat(env, &mst);
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rc = mdb_txn_begin(env, NULL, 1, &txn);
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rc = mdb_cursor_open(txn, dbi, &cursor);
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while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
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printf("key: %p %.*s, data: %p %.*s\n",
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key.mv_data, (int) key.mv_size, (char *) key.mv_data,
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data.mv_data, (int) data.mv_size, (char *) data.mv_data);
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}
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mdb_cursor_close(cursor);
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mdb_txn_abort(txn);
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j=0;
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key.mv_data = sval;
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for (i= count - 1; i > -1; i-= (random()%5)) {
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j++;
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txn=NULL;
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rc = mdb_txn_begin(env, NULL, 0, &txn);
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sprintf(sval, "%03x ", values[i]);
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rc = mdb_del(txn, dbi, &key, NULL);
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if (rc) {
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j--;
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mdb_txn_abort(txn);
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} else {
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rc = mdb_txn_commit(txn);
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}
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}
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free(values);
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printf("Deleted %d values\n", j);
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rc = mdb_env_stat(env, &mst);
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rc = mdb_txn_begin(env, NULL, 1, &txn);
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rc = mdb_cursor_open(txn, dbi, &cursor);
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printf("Cursor next\n");
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while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
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printf("key: %.*s, data: %.*s\n",
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(int) key.mv_size, (char *) key.mv_data,
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(int) data.mv_size, (char *) data.mv_data);
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}
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printf("Cursor prev\n");
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while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
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printf("key: %.*s, data: %.*s\n",
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(int) key.mv_size, (char *) key.mv_data,
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(int) data.mv_size, (char *) data.mv_data);
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}
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mdb_cursor_close(cursor);
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mdb_close(env, dbi);
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mdb_txn_abort(txn);
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mdb_env_close(env);
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return 0;
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}
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