mtest6.c (3953B)
1 /* mtest6.c - memory-mapped database tester/toy */ 2 /* 3 * Copyright 2011-2021 Howard Chu, Symas Corp. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted only as authorized by the OpenLDAP 8 * Public License. 9 * 10 * A copy of this license is available in the file LICENSE in the 11 * top-level directory of the distribution or, alternatively, at 12 * <http://www.OpenLDAP.org/license.html>. 13 */ 14 15 /* Tests for DB splits and merges */ 16 #include <stdio.h> 17 #include <stdlib.h> 18 #include <string.h> 19 #include <time.h> 20 #include "lmdb.h" 21 22 #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) 23 #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) 24 #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ 25 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) 26 27 char dkbuf[1024]; 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, sdata; 35 MDB_txn *txn; 36 MDB_stat mst; 37 MDB_cursor *cursor; 38 int count; 39 int *values; 40 long kval; 41 char *sval; 42 43 srand(time(NULL)); 44 45 E(mdb_env_create(&env)); 46 E(mdb_env_set_mapsize(env, 10485760)); 47 E(mdb_env_set_maxdbs(env, 4)); 48 E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664)); 49 50 E(mdb_txn_begin(env, NULL, 0, &txn)); 51 E(mdb_dbi_open(txn, "id6", MDB_CREATE|MDB_INTEGERKEY, &dbi)); 52 E(mdb_cursor_open(txn, dbi, &cursor)); 53 E(mdb_stat(txn, dbi, &mst)); 54 55 sval = calloc(1, mst.ms_psize / 4); 56 key.mv_size = sizeof(long); 57 key.mv_data = &kval; 58 sdata.mv_size = mst.ms_psize / 4 - 30; 59 sdata.mv_data = sval; 60 61 printf("Adding 12 values, should yield 3 splits\n"); 62 for (i=0;i<12;i++) { 63 kval = i*5; 64 sprintf(sval, "%08x", kval); 65 data = sdata; 66 (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE)); 67 } 68 printf("Adding 12 more values, should yield 3 splits\n"); 69 for (i=0;i<12;i++) { 70 kval = i*5+4; 71 sprintf(sval, "%08x", kval); 72 data = sdata; 73 (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE)); 74 } 75 printf("Adding 12 more values, should yield 3 splits\n"); 76 for (i=0;i<12;i++) { 77 kval = i*5+1; 78 sprintf(sval, "%08x", kval); 79 data = sdata; 80 (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE)); 81 } 82 E(mdb_cursor_get(cursor, &key, &data, MDB_FIRST)); 83 84 do { 85 printf("key: %p %s, data: %p %.*s\n", 86 key.mv_data, mdb_dkey(&key, dkbuf), 87 data.mv_data, (int) data.mv_size, (char *) data.mv_data); 88 } while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0); 89 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 90 mdb_cursor_close(cursor); 91 mdb_txn_commit(txn); 92 93 #if 0 94 j=0; 95 96 for (i= count - 1; i > -1; i-= (rand()%5)) { 97 j++; 98 txn=NULL; 99 E(mdb_txn_begin(env, NULL, 0, &txn)); 100 sprintf(kval, "%03x", values[i & ~0x0f]); 101 sprintf(sval, "%03x %d foo bar", values[i], values[i]); 102 key.mv_size = sizeof(int); 103 key.mv_data = kval; 104 data.mv_size = sizeof(sval); 105 data.mv_data = sval; 106 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) { 107 j--; 108 mdb_txn_abort(txn); 109 } else { 110 E(mdb_txn_commit(txn)); 111 } 112 } 113 free(values); 114 printf("Deleted %d values\n", j); 115 116 E(mdb_env_stat(env, &mst)); 117 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); 118 E(mdb_cursor_open(txn, dbi, &cursor)); 119 printf("Cursor next\n"); 120 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 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 prev\n"); 127 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { 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 } 132 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); 133 mdb_cursor_close(cursor); 134 mdb_txn_abort(txn); 135 136 mdb_dbi_close(env, dbi); 137 #endif 138 mdb_env_close(env); 139 140 return 0; 141 }