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024c5bfb60
Fix mdb_txn_begin(&read-only txn) calls. Test mdb_env_set_maxreaders(). Rename DBI open/close functions. Move mdb_dbi_close() out of txn. Change-Id: I05c58bfd5d90b7b291718036a3c49ef6ba017ac8
63 lines
1.6 KiB
Plaintext
63 lines
1.6 KiB
Plaintext
/* sample-mdb.txt - MDB toy/sample
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*
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* Do a line-by-line comparison of this and sample-bdb.txt
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*/
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/*
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* Copyright 2012-2015 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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#include <stdio.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 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_cursor *cursor;
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char sval[32];
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/* Note: Most error checking omitted for simplicity */
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rc = mdb_env_create(&env);
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rc = mdb_env_open(env, "./testdb", 0, 0664);
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rc = mdb_txn_begin(env, NULL, 0, &txn);
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rc = mdb_dbi_open(txn, NULL, 0, &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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sprintf(sval, "%03x %d foo bar", 32, 3141592);
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rc = mdb_put(txn, dbi, &key, &data, 0);
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rc = mdb_txn_commit(txn);
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if (rc) {
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fprintf(stderr, "mdb_txn_commit: (%d) %s\n", rc, mdb_strerror(rc));
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goto leave;
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}
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rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &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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leave:
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mdb_dbi_close(env, dbi);
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mdb_env_close(env);
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return 0;
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}
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