1 /* $NetBSD: mtest2.c,v 1.1.1.2 2017/02/09 01:46:45 christos Exp $ */ 2 3 /* mtest2.c - memory-mapped database tester/toy */ 4 /* 5 * Copyright 2011-2016 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 17 /* Just like mtest.c, but using a subDB instead of the main DB */ 18 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <time.h> 22 #include "lmdb.h" 23 24 #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) 25 #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) 26 #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ 27 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) 28 29 int main(int argc,char * argv[]) 30 { 31 int i = 0, j = 0, rc; 32 MDB_env *env; 33 MDB_dbi dbi; 34 MDB_val key, data; 35 MDB_txn *txn; 36 MDB_stat mst; 37 MDB_cursor *cursor; 38 int count; 39 int *values; 40 char sval[32] = ""; 41 42 srand(time(NULL)); 43 44 count = (rand()%384) + 64; 45 values = (int *)malloc(count*sizeof(int)); 46 47 for(i = 0;i<count;i++) { 48 values[i] = rand()%1024; 49 } 50 51 E(mdb_env_create(&env)); 52 E(mdb_env_set_maxreaders(env, 1)); 53 E(mdb_env_set_mapsize(env, 10485760)); 54 E(mdb_env_set_maxdbs(env, 4)); 55 E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664)); 56 57 E(mdb_txn_begin(env, NULL, 0, &txn)); 58 E(mdb_dbi_open(txn, "id1", MDB_CREATE, &dbi)); 59 60 key.mv_size = sizeof(int); 61 key.mv_data = sval; 62 63 printf("Adding %d values\n", count); 64 for (i=0;i<count;i++) { 65 sprintf(sval, "%03x %d foo bar", values[i], values[i]); 66 data.mv_size = sizeof(sval); 67 data.mv_data = sval; 68 if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) 69 j++; 70 } 71 if (j) printf("%d duplicates skipped\n", j); 72 E(mdb_txn_commit(txn)); 73 E(mdb_env_stat(env, &mst)); 74 75 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); 76 E(mdb_cursor_open(txn, dbi, &cursor)); 77 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { 78 printf("key: %p %.*s, data: %p %.*s\n", 79 key.mv_data, (int) key.mv_size, (char *) key.mv_data, 80 data.mv_data, (int) data.mv_size, (char *) data.mv_data); 81 } 82 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 83 mdb_cursor_close(cursor); 84 mdb_txn_abort(txn); 85 86 j=0; 87 key.mv_data = sval; 88 for (i= count - 1; i > -1; i-= (rand()%5)) { 89 j++; 90 txn=NULL; 91 E(mdb_txn_begin(env, NULL, 0, &txn)); 92 sprintf(sval, "%03x ", values[i]); 93 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) { 94 j--; 95 mdb_txn_abort(txn); 96 } else { 97 E(mdb_txn_commit(txn)); 98 } 99 } 100 free(values); 101 printf("Deleted %d values\n", j); 102 103 E(mdb_env_stat(env, &mst)); 104 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); 105 E(mdb_cursor_open(txn, dbi, &cursor)); 106 printf("Cursor next\n"); 107 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { 108 printf("key: %.*s, data: %.*s\n", 109 (int) key.mv_size, (char *) key.mv_data, 110 (int) data.mv_size, (char *) data.mv_data); 111 } 112 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 113 printf("Cursor prev\n"); 114 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { 115 printf("key: %.*s, data: %.*s\n", 116 (int) key.mv_size, (char *) key.mv_data, 117 (int) data.mv_size, (char *) data.mv_data); 118 } 119 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 120 mdb_cursor_close(cursor); 121 mdb_txn_abort(txn); 122 123 mdb_dbi_close(env, dbi); 124 mdb_env_close(env); 125 return 0; 126 } 127