/* $NetBSD: mtest.c,v 1.1.1.3.6.1 2019/08/10 06:17:15 martin Exp $ */ /* mtest.c - memory-mapped database tester/toy */ /* * Copyright 2011-2018 Howard Chu, Symas Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ #include #include #include #include "lmdb.h" #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) int main(int argc,char * argv[]) { int i = 0, j = 0, rc; MDB_env *env; MDB_dbi dbi; MDB_val key, data; MDB_txn *txn; MDB_stat mst; MDB_cursor *cursor, *cur2; MDB_cursor_op op; int count; int *values; char sval[32] = ""; srand(time(NULL)); count = (rand()%384) + 64; values = (int *)malloc(count*sizeof(int)); for(i = 0;i in each iteration, since MDB_NOOVERWRITE may modify it */ data.mv_size = sizeof(sval); data.mv_data = sval; if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) { j++; data.mv_size = sizeof(sval); data.mv_data = sval; } } if (j) printf("%d duplicates skipped\n", j); E(mdb_txn_commit(txn)); E(mdb_env_stat(env, &mst)); E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); E(mdb_cursor_open(txn, dbi, &cursor)); while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { printf("key: %p %.*s, data: %p %.*s\n", key.mv_data, (int) key.mv_size, (char *) key.mv_data, data.mv_data, (int) data.mv_size, (char *) data.mv_data); } CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); mdb_cursor_close(cursor); mdb_txn_abort(txn); j=0; key.mv_data = sval; for (i= count - 1; i > -1; i-= (rand()%5)) { j++; txn=NULL; E(mdb_txn_begin(env, NULL, 0, &txn)); sprintf(sval, "%03x ", values[i]); if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) { j--; mdb_txn_abort(txn); } else { E(mdb_txn_commit(txn)); } } free(values); printf("Deleted %d values\n", j); E(mdb_env_stat(env, &mst)); E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); E(mdb_cursor_open(txn, dbi, &cursor)); printf("Cursor next\n"); while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { printf("key: %.*s, data: %.*s\n", (int) key.mv_size, (char *) key.mv_data, (int) data.mv_size, (char *) data.mv_data); } CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); printf("Cursor last\n"); E(mdb_cursor_get(cursor, &key, &data, MDB_LAST)); printf("key: %.*s, data: %.*s\n", (int) key.mv_size, (char *) key.mv_data, (int) data.mv_size, (char *) data.mv_data); printf("Cursor prev\n"); while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { printf("key: %.*s, data: %.*s\n", (int) key.mv_size, (char *) key.mv_data, (int) data.mv_size, (char *) data.mv_data); } CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); printf("Cursor last/prev\n"); E(mdb_cursor_get(cursor, &key, &data, MDB_LAST)); printf("key: %.*s, data: %.*s\n", (int) key.mv_size, (char *) key.mv_data, (int) data.mv_size, (char *) data.mv_data); E(mdb_cursor_get(cursor, &key, &data, MDB_PREV)); printf("key: %.*s, data: %.*s\n", (int) key.mv_size, (char *) key.mv_data, (int) data.mv_size, (char *) data.mv_data); mdb_cursor_close(cursor); mdb_txn_abort(txn); printf("Deleting with cursor\n"); E(mdb_txn_begin(env, NULL, 0, &txn)); E(mdb_cursor_open(txn, dbi, &cur2)); for (i=0; i<50; i++) { if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, MDB_NEXT))) break; printf("key: %p %.*s, data: %p %.*s\n", key.mv_data, (int) key.mv_size, (char *) key.mv_data, data.mv_data, (int) data.mv_size, (char *) data.mv_data); E(mdb_del(txn, dbi, &key, NULL)); } printf("Restarting cursor in txn\n"); for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) { if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, op))) break; printf("key: %p %.*s, data: %p %.*s\n", key.mv_data, (int) key.mv_size, (char *) key.mv_data, data.mv_data, (int) data.mv_size, (char *) data.mv_data); } mdb_cursor_close(cur2); E(mdb_txn_commit(txn)); printf("Restarting cursor outside txn\n"); E(mdb_txn_begin(env, NULL, 0, &txn)); E(mdb_cursor_open(txn, dbi, &cursor)); for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) { if (RES(MDB_NOTFOUND, mdb_cursor_get(cursor, &key, &data, op))) break; printf("key: %p %.*s, data: %p %.*s\n", key.mv_data, (int) key.mv_size, (char *) key.mv_data, data.mv_data, (int) data.mv_size, (char *) data.mv_data); } mdb_cursor_close(cursor); mdb_txn_abort(txn); mdb_dbi_close(env, dbi); mdb_env_close(env); return 0; }