libmdbx/mtest0.c

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/* mtest.c - memory-mapped database tester/toy */
/*
* Copyright 2015-2017 Leonid Yuriev <leo@yuriev.ru>.
* Copyright 2011-2017 Howard Chu, Symas Corp.
* Copyright 2015,2016 Peter-Service R&D LLC.
* 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 "mdbx.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include <pthread.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, mdbx_strerror(rc)), \
abort()))
#ifndef DBPATH
#define DBPATH "./testdb"
#endif
void *thread_entry(void *ctx) {
MDB_env *env = ctx;
MDB_txn *txn;
int rc;
E(mdbx_txn_begin(env, NULL, MDB_RDONLY, &txn));
mdbx_txn_abort(txn);
return NULL;
}
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;
MDBX_stat mst;
MDB_cursor *cursor, *cur2;
MDB_cursor_op op;
int count;
int *values;
char sval[32] = "";
int env_oflags;
struct stat db_stat, exe_stat;
(void)argc;
(void)argv;
srand(time(NULL));
count = (rand() % 384) + 64;
values = (int *)malloc(count * sizeof(int));
for (i = 0; i < count; i++) {
values[i] = rand() % 1024;
}
E(mdbx_env_create(&env));
E(mdbx_env_set_maxreaders(env, 42));
E(mdbx_env_set_mapsize(env, 10485760));
E(stat("/proc/self/exe", &exe_stat) ? errno : 0);
E(stat(DBPATH "/.", &db_stat) ? errno : 0);
env_oflags = MDB_FIXEDMAP | MDB_NOSYNC;
if (major(db_stat.st_dev) != major(exe_stat.st_dev)) {
/* LY: Assume running inside a CI-environment:
* 1) don't use FIXEDMAP to avoid EBUSY in case collision,
* which could be inspired by address space randomisation feature.
* 2) drop MDB_NOSYNC expecting that DBPATH is at a tmpfs or some
* dedicated storage.
*/
env_oflags = 0;
}
E(mdbx_env_open(env, DBPATH, env_oflags, 0664));
E(mdbx_txn_begin(env, NULL, 0, &txn));
E(mdbx_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, mdbx_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(mdbx_txn_commit(txn));
E(mdbx_env_stat(env, &mst, sizeof(mst)));
E(mdbx_txn_begin(env, NULL, MDB_RDONLY, &txn));
E(mdbx_cursor_open(txn, dbi, &cursor));
while ((rc = mdbx_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, "mdbx_cursor_get");
mdbx_cursor_close(cursor);
mdbx_txn_abort(txn);
j = 0;
key.mv_data = sval;
for (i = count - 1; i > -1; i -= (rand() % 5)) {
j++;
txn = NULL;
E(mdbx_txn_begin(env, NULL, 0, &txn));
sprintf(sval, "%03x ", values[i]);
if (RES(MDB_NOTFOUND, mdbx_del(txn, dbi, &key, NULL))) {
j--;
mdbx_txn_abort(txn);
} else {
E(mdbx_txn_commit(txn));
}
}
free(values);
printf("Deleted %d values\n", j);
E(mdbx_env_stat(env, &mst, sizeof(mst)));
E(mdbx_txn_begin(env, NULL, MDB_RDONLY, &txn));
E(mdbx_cursor_open(txn, dbi, &cursor));
printf("Cursor next\n");
while ((rc = mdbx_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, "mdbx_cursor_get");
printf("Cursor last\n");
E(mdbx_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 = mdbx_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, "mdbx_cursor_get");
printf("Cursor last/prev\n");
E(mdbx_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(mdbx_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);
mdbx_cursor_close(cursor);
mdbx_txn_abort(txn);
printf("Deleting with cursor\n");
E(mdbx_txn_begin(env, NULL, 0, &txn));
E(mdbx_cursor_open(txn, dbi, &cur2));
for (i = 0; i < 50; i++) {
if (RES(MDB_NOTFOUND, mdbx_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(mdbx_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, mdbx_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);
}
mdbx_cursor_close(cur2);
E(mdbx_txn_commit(txn));
for (i = 0; i < 41; ++i) {
pthread_t thread;
pthread_create(&thread, NULL, thread_entry, env);
}
printf("Restarting cursor outside txn\n");
E(mdbx_txn_begin(env, NULL, 0, &txn));
E(mdbx_cursor_open(txn, dbi, &cursor));
for (op = MDB_FIRST, i = 0; i <= 32; op = MDB_NEXT, i++) {
if (RES(MDB_NOTFOUND, mdbx_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);
}
mdbx_cursor_close(cursor);
mdbx_txn_abort(txn);
mdbx_dbi_close(env, dbi);
mdbx_env_close(env);
return 0;
}