1/* $NetBSD: mtest.c,v 1.3 2021/08/14 16:14:57 christos Exp $ */ 2 3/* mtest.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#include <stdio.h> 17#include <stdlib.h> 18#include <time.h> 19#include "lmdb.h" 20 21#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) 22#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) 23#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ 24 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) 25 26int main(int argc,char * argv[]) 27{ 28 int i = 0, j = 0, rc; 29 MDB_env *env; 30 MDB_dbi dbi; 31 MDB_val key, data; 32 MDB_txn *txn; 33 MDB_stat mst; 34 MDB_cursor *cursor, *cur2; 35 MDB_cursor_op op; 36 int count; 37 int *values; 38 char sval[32] = ""; 39 40 srand(time(NULL)); 41 42 count = (rand()%384) + 64; 43 values = (int *)malloc(count*sizeof(int)); 44 45 for(i = 0;i<count;i++) { 46 values[i] = rand()%1024; 47 } 48 49 E(mdb_env_create(&env)); 50 E(mdb_env_set_maxreaders(env, 1)); 51 E(mdb_env_set_mapsize(env, 10485760)); 52 E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP /*|MDB_NOSYNC*/, 0664)); 53 54 E(mdb_txn_begin(env, NULL, 0, &txn)); 55 E(mdb_dbi_open(txn, NULL, 0, &dbi)); 56 57 key.mv_size = sizeof(int); 58 key.mv_data = sval; 59 60 printf("Adding %d values\n", count); 61 for (i=0;i<count;i++) { 62 sprintf(sval, "%03x %d foo bar", values[i], values[i]); 63 /* Set <data> in each iteration, since MDB_NOOVERWRITE may modify it */ 64 data.mv_size = sizeof(sval); 65 data.mv_data = sval; 66 if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) { 67 j++; 68 data.mv_size = sizeof(sval); 69 data.mv_data = sval; 70 } 71 } 72 if (j) printf("%d duplicates skipped\n", j); 73 E(mdb_txn_commit(txn)); 74 E(mdb_env_stat(env, &mst)); 75 76 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); 77 E(mdb_cursor_open(txn, dbi, &cursor)); 78 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { 79 printf("key: %p %.*s, data: %p %.*s\n", 80 key.mv_data, (int) key.mv_size, (char *) key.mv_data, 81 data.mv_data, (int) data.mv_size, (char *) data.mv_data); 82 } 83 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 84 mdb_cursor_close(cursor); 85 mdb_txn_abort(txn); 86 87 j=0; 88 key.mv_data = sval; 89 for (i= count - 1; i > -1; i-= (rand()%5)) { 90 j++; 91 txn=NULL; 92 E(mdb_txn_begin(env, NULL, 0, &txn)); 93 sprintf(sval, "%03x ", values[i]); 94 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) { 95 j--; 96 mdb_txn_abort(txn); 97 } else { 98 E(mdb_txn_commit(txn)); 99 } 100 } 101 free(values); 102 printf("Deleted %d values\n", j); 103 104 E(mdb_env_stat(env, &mst)); 105 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); 106 E(mdb_cursor_open(txn, dbi, &cursor)); 107 printf("Cursor next\n"); 108 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { 109 printf("key: %.*s, data: %.*s\n", 110 (int) key.mv_size, (char *) key.mv_data, 111 (int) data.mv_size, (char *) data.mv_data); 112 } 113 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 114 printf("Cursor last\n"); 115 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST)); 116 printf("key: %.*s, data: %.*s\n", 117 (int) key.mv_size, (char *) key.mv_data, 118 (int) data.mv_size, (char *) data.mv_data); 119 printf("Cursor prev\n"); 120 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { 121 printf("key: %.*s, data: %.*s\n", 122 (int) key.mv_size, (char *) key.mv_data, 123 (int) data.mv_size, (char *) data.mv_data); 124 } 125 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 126 printf("Cursor last/prev\n"); 127 E(mdb_cursor_get(cursor, &key, &data, MDB_LAST)); 128 printf("key: %.*s, data: %.*s\n", 129 (int) key.mv_size, (char *) key.mv_data, 130 (int) data.mv_size, (char *) data.mv_data); 131 E(mdb_cursor_get(cursor, &key, &data, MDB_PREV)); 132 printf("key: %.*s, data: %.*s\n", 133 (int) key.mv_size, (char *) key.mv_data, 134 (int) data.mv_size, (char *) data.mv_data); 135 136 mdb_cursor_close(cursor); 137 mdb_txn_abort(txn); 138 139 printf("Deleting with cursor\n"); 140 E(mdb_txn_begin(env, NULL, 0, &txn)); 141 E(mdb_cursor_open(txn, dbi, &cur2)); 142 for (i=0; i<50; i++) { 143 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, MDB_NEXT))) 144 break; 145 printf("key: %p %.*s, data: %p %.*s\n", 146 key.mv_data, (int) key.mv_size, (char *) key.mv_data, 147 data.mv_data, (int) data.mv_size, (char *) data.mv_data); 148 E(mdb_del(txn, dbi, &key, NULL)); 149 } 150 151 printf("Restarting cursor in txn\n"); 152 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) { 153 if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, op))) 154 break; 155 printf("key: %p %.*s, data: %p %.*s\n", 156 key.mv_data, (int) key.mv_size, (char *) key.mv_data, 157 data.mv_data, (int) data.mv_size, (char *) data.mv_data); 158 } 159 mdb_cursor_close(cur2); 160 E(mdb_txn_commit(txn)); 161 162 printf("Restarting cursor outside txn\n"); 163 E(mdb_txn_begin(env, NULL, 0, &txn)); 164 E(mdb_cursor_open(txn, dbi, &cursor)); 165 for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) { 166 if (RES(MDB_NOTFOUND, mdb_cursor_get(cursor, &key, &data, op))) 167 break; 168 printf("key: %p %.*s, data: %p %.*s\n", 169 key.mv_data, (int) key.mv_size, (char *) key.mv_data, 170 data.mv_data, (int) data.mv_size, (char *) data.mv_data); 171 } 172 mdb_cursor_close(cursor); 173 mdb_txn_abort(txn); 174 175 mdb_dbi_close(env, dbi); 176 mdb_env_close(env); 177 178 return 0; 179} 180