openldap/libraries/libmdb/mtest.c

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/* mtest.c - memory-mapped database tester/toy */
/*
* Copyright 2011 Howard Chu, Symas Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
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#define _XOPEN_SOURCE 500 /* srandom(), random() */
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "mdb.h"
int main(int argc,char * argv[])
{
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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;
MDB_txn *txn;
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MDB_stat mst;
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MDB_cursor *cursor;
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int count;
int *values;
char sval[32];
srandom(time(NULL));
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count = (random()%384) + 64;
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values = (int *)malloc(count*sizeof(int));
for(i = 0;i<count;i++) {
values[i] = random()%1024;
}
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rc = mdb_env_create(&env);
rc = mdb_env_set_mapsize(env, 10485760);
rc = mdb_env_open(env, "./testdb", MDB_FIXEDMAP /*|MDB_NOSYNC*/, 0664);
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rc = mdb_txn_begin(env, 0, &txn);
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rc = mdb_open(txn, NULL, 0, &dbi);
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key.mv_size = sizeof(int);
key.mv_data = sval;
data.mv_size = sizeof(sval);
data.mv_data = sval;
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printf("Adding %d values\n", count);
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for (i=0;i<count;i++) {
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++;
}
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, 1, &txn);
rc = mdb_cursor_open(txn, dbi, &cursor);
while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
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printf("key: %p %.*s, data: %p %.*s\n",
key.mv_data, (int) key.mv_size, (char *) key.mv_data,
data.mv_data, (int) data.mv_size, (char *) data.mv_data);
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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, 0, &txn);
sprintf(sval, "%03x ", values[i]);
rc = mdb_del(txn, dbi, &key, NULL);
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if (rc) {
j--;
mdb_txn_abort(txn);
} else {
rc = mdb_txn_commit(txn);
}
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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, 1, &txn);
rc = mdb_cursor_open(txn, dbi, &cursor);
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printf("Cursor next\n");
while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
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printf("key: %.*s, data: %.*s\n",
(int) key.mv_size, (char *) key.mv_data,
(int) data.mv_size, (char *) data.mv_data);
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}
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printf("Cursor prev\n");
while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
printf("key: %.*s, data: %.*s\n",
(int) key.mv_size, (char *) key.mv_data,
(int) data.mv_size, (char *) data.mv_data);
}
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#if 0
/* write ops aren't coordinated with cursors,
* this stuff all breaks
*/
printf("Deleting with cursor\n");
rc = mdb_txn_begin(env, 0, &txn);
rc = mdb_cursor_open(db, txn, &cur2);
for (i=0; i<50; i++) {
rc = mdb_cursor_get(cur2, &key, &data, MDB_NEXT);
printf("key: %p %.*s, data: %p %.*s\n",
key.mv_data, (int) key.mv_size, (char *) key.mv_data,
data.mv_data, (int) data.mv_size, (char *) data.mv_data);
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rc = mdb_del(db, txn, &key, NULL);
}
printf("Restarting cursor in txn\n");
rc = mdb_cursor_get(cur2, &key, &data, MDB_FIRST);
printf("key: %p %.*s, data: %p %.*s\n",
key.mv_data, (int) key.mv_size, (char *) key.mv_data,
data.mv_data, (int) data.mv_size, (char *) data.mv_data);
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for (i=0; i<32; i++) {
rc = mdb_cursor_get(cur2, &key, &data, MDB_NEXT);
printf("key: %p %.*s, data: %p %.*s\n",
key.mv_data, (int) key.mv_size, (char *) key.mv_data,
data.mv_data, (int) data.mv_size, (char *) data.mv_data);
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}
mdb_cursor_close(cur2);
rc = mdb_txn_commit(txn);
mdb_cursor_close(cursor);
printf("Restarting cursor outside txn\n");
rc = mdb_cursor_open(db, NULL, &cursor);
rc = mdb_cursor_get(cursor, &key, &data, MDB_FIRST);
printf("key: %p %.*s, data: %p %.*s\n",
key.mv_data, (int) key.mv_size, (char *) key.mv_data,
data.mv_data, (int) data.mv_size, (char *) data.mv_data);
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for (i=0; i<32; i++) {
rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT);
printf("key: %p %.*s, data: %p %.*s\n",
key.mv_data, (int) key.mv_size, (char *) key.mv_data,
data.mv_data, (int) data.mv_size, (char *) data.mv_data);
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}
#endif
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mdb_cursor_close(cursor);
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mdb_close(txn, dbi);
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mdb_txn_abort(txn);
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mdb_env_close(env);
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return 0;
}