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5c89827817
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.
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/* mtest2.c - memory-mapped database tester/toy */
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/*
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* Copyright 2011-2015 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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/* Just like mtest.c, but using a subDB instead of the main DB */
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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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#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
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#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
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#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
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"%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
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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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srand(time(NULL));
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count = (rand()%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] = rand()%1024;
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}
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E(mdb_env_create(&env));
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E(mdb_env_set_maxreaders(env, 1));
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E(mdb_env_set_mapsize(env, 10485760));
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E(mdb_env_set_maxdbs(env, 4));
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E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664));
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E(mdb_txn_begin(env, NULL, 0, &txn));
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E(mdb_dbi_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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if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE)))
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j++;
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}
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if (j) printf("%d duplicates skipped\n", j);
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E(mdb_txn_commit(txn));
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E(mdb_env_stat(env, &mst));
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E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
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E(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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CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
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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-= (rand()%5)) {
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j++;
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txn=NULL;
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E(mdb_txn_begin(env, NULL, 0, &txn));
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sprintf(sval, "%03x ", values[i]);
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if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) {
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j--;
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mdb_txn_abort(txn);
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} else {
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E(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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E(mdb_env_stat(env, &mst));
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E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
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E(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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CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
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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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CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
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mdb_cursor_close(cursor);
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mdb_txn_abort(txn);
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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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