/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
/*======
This file is part of PerconaFT.


Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.

    PerconaFT is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License, version 2,
    as published by the Free Software Foundation.

    PerconaFT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.

----------------------------------------

    PerconaFT is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License, version 3,
    as published by the Free Software Foundation.

    PerconaFT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
======= */

#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."

#include "test.h"
#include <pthread.h>

// verify that a commit of a big txn does not block the commits of other txn's
// commit writer (0) happens before bigtxn commit (1) happens before checkpoint (2)
static int test_state = 0;

static void *checkpoint_thread(void *arg) {
    sleep(1);
    DB_ENV *env = (DB_ENV *) arg;
    printf("%s start\n", __FUNCTION__);
    int r = env->txn_checkpoint(env, 0, 0, 0);
    assert(r == 0);
    printf("%s done\n", __FUNCTION__);
    int old_state = toku_sync_fetch_and_add(&test_state, 1);
    assert(old_state == 2);
    return arg;
}

struct writer_arg {
    DB_ENV *env;
    DB *db;
    int k;
};

static void *w_thread(void *arg) {
    sleep(2);
    struct writer_arg *warg = (struct writer_arg *) arg;
    DB_ENV *env = warg->env;
    DB *db = warg->db;
    int k = warg->k;
    printf("%s start\n", __FUNCTION__);
    int r;
    DB_TXN *txn;
    r = env->txn_begin(env, NULL, &txn, 0);
    assert(r == 0);
    if (1) {
        DBT key = { .data = &k, .size = sizeof k };
        DBT val = { .data = &k, .size = sizeof k };
        r = db->put(db, txn, &key, &val, 0);
        assert(r == 0);
    }
    r = txn->commit(txn, 0);
    assert(r == 0);
    printf("%s done\n", __FUNCTION__);
    int old_state = toku_sync_fetch_and_add(&test_state, 1);
    assert(old_state == 0);
    return arg;
}

static void bigtxn_progress(TOKU_TXN_PROGRESS progress, void *extra) {
    printf("%s %" PRIu64 " %" PRIu64 " %p\n", __FUNCTION__, progress->entries_processed, progress->entries_total, extra);
    sleep(1);
}

int test_main (int argc, char *const argv[]) {
    int r;
    int N = 25000;
    for (int i = 1; i < argc; i++) {
        if (strcmp(argv[i], "--N") == 0 && i+1 < argc) {
            N = atoi(argv[++i]);
            continue;
        }
    }

    toku_os_recursive_delete(TOKU_TEST_FILENAME);
    r = toku_os_mkdir(TOKU_TEST_FILENAME, S_IRWXU+S_IRWXG+S_IRWXO);
    assert(r == 0);

    DB_ENV *env;
    r = db_env_create(&env, 0);
    assert(r == 0);

    // avoid locktree escalation by picking a big enough lock tree
    r = env->set_lk_max_memory(env, 128*1024*1024);
    assert(r == 0);

    r = env->open(env, TOKU_TEST_FILENAME, DB_INIT_MPOOL|DB_CREATE|DB_THREAD |DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_PRIVATE, S_IRWXU+S_IRWXG+S_IRWXO);
    assert(r == 0);

    DB *db = NULL;
    r = db_create(&db, env, 0);
    assert(r == 0);

    r = db->open(db, NULL, "testit", NULL, DB_BTREE, DB_AUTO_COMMIT+DB_CREATE, S_IRWXU+S_IRWXG+S_IRWXO);
    assert(r == 0);

    DB_TXN *bigtxn = NULL;
    r = env->txn_begin(env, NULL, &bigtxn, 0); 
    assert(r == 0);

    // use a big key so that the rollback log spills
    char k[1024]; memset(k, 0, sizeof k);
    char v[8]; memset(v, 0, sizeof v);

    for (int i = 0; i < N; i++) {
        memcpy(k, &i, sizeof i);
        memcpy(v, &i, sizeof i);
        DBT key = { .data = k, .size = sizeof k };
        DBT val = { .data = v, .size = sizeof v };
        r = db->put(db, bigtxn, &key, &val, 0);
        assert(r == 0);
        if ((i % 10000) == 0)
            printf("put %d\n", i);
    }

    pthread_t checkpoint_tid = 0;
    r = pthread_create(&checkpoint_tid, NULL, checkpoint_thread, env);
    assert(r == 0);

    pthread_t w_tid = 0;
    struct writer_arg w_arg = { env, db, N };
    r = pthread_create(&w_tid, NULL, w_thread, &w_arg);
    assert(r == 0);

    r = bigtxn->commit_with_progress(bigtxn, 0, bigtxn_progress, NULL);
    assert(r == 0);
    int old_state = toku_sync_fetch_and_add(&test_state, 1);
    assert(old_state == 1);

    void *ret;
    r = pthread_join(w_tid, &ret);
    assert(r == 0);
    r = pthread_join(checkpoint_tid, &ret);
    assert(r == 0);

    r = db->close(db, 0);
    assert(r == 0);

    r = env->close(env, 0);
    assert(r == 0);

    return 0;
}