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Diffstat (limited to '')
| -rw-r--r-- | libraries/liblmdb/mtest.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/libraries/liblmdb/mtest.c b/libraries/liblmdb/mtest.c new file mode 100644 index 0000000..6fc5840 --- /dev/null +++ b/libraries/liblmdb/mtest.c @@ -0,0 +1,177 @@ +/* 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 + * <http://www.OpenLDAP.org/license.html>. + */ +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#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<count;i++) { + values[i] = rand()%1024; + } + + E(mdb_env_create(&env)); + E(mdb_env_set_maxreaders(env, 1)); + E(mdb_env_set_mapsize(env, 10485760)); + E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP /*|MDB_NOSYNC*/, 0664)); + + E(mdb_txn_begin(env, NULL, 0, &txn)); + E(mdb_dbi_open(txn, NULL, 0, &dbi)); + + key.mv_size = sizeof(int); + key.mv_data = sval; + + printf("Adding %d values\n", count); + for (i=0;i<count;i++) { + sprintf(sval, "%03x %d foo bar", values[i], values[i]); + /* Set <data> 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; +} |