/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
/*
COPYING CONDITIONS NOTICE:

  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation, and provided that the
  following conditions are met:

      * Redistributions of source code must retain this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
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  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
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COPYRIGHT NOTICE:

  TokuDB, Tokutek Fractal Tree Indexing Library.
  Copyright (C) 2007-2013 Tokutek, Inc.

DISCLAIMER:

  This program 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.

UNIVERSITY PATENT NOTICE:

  The technology is licensed by the Massachusetts Institute of
  Technology, Rutgers State University of New Jersey, and the Research
  Foundation of State University of New York at Stony Brook under
  United States of America Serial No. 11/760379 and to the patents
  and/or patent applications resulting from it.

PATENT MARKING NOTICE:

  This software is covered by US Patent No. 8,185,551.
  This software is covered by US Patent No. 8,489,638.

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*/

#ident "Copyright (c) 2014 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."

// test the kill callback.  the lock wait is killed 1/2 of the way through the wait.

#include "lock_request_unit_test.h"

namespace toku {

const uint64_t my_lock_wait_time = 10 * 1000; // 10 seconds
const uint64_t my_killed_time = 1 * 1000;

static int killed_calls = 0;
static uint64_t t_last_kill;
static uint64_t t_do_kill;

static int my_killed_callback(void) {
    uint64_t t_now = toku_current_time_microsec();
    assert(t_now >= t_last_kill);
    assert(t_now - t_last_kill >= my_killed_time * 1000 / 2); // div by 2 for valgrind which is not very accurate
    t_last_kill = t_now;
    killed_calls++;
    if (t_now >= t_do_kill)
        return 1;
    else
        return 0;
}

// make sure deadlocks are detected when a lock request starts
void lock_request_unit_test::test_wait_time_callback(void) {
    int r;
    locktree::manager mgr;
    locktree *lt;

    mgr.create(nullptr, nullptr, nullptr, nullptr);

    DICTIONARY_ID dict_id = { 1 };
    lt = mgr.get_lt(dict_id, nullptr, compare_dbts, nullptr);

    TXNID txnid_a = 1001;
    lock_request request_a;
    request_a.create();

    TXNID txnid_b = 2001;
    lock_request request_b;
    request_b.create();

    const DBT *one = get_dbt(1);

    // a locks 'one'
    request_a.set(lt, txnid_a, one, one, lock_request::type::WRITE, false);
    r = request_a.start();
    assert_zero(r);

    // b tries to lock 'one'
    request_b.set(lt, txnid_b, one, one, lock_request::type::WRITE, false);
    r = request_b.start();
    assert(r == DB_LOCK_NOTGRANTED);

    uint64_t t_start = toku_current_time_microsec();
    t_last_kill = t_start;
    t_do_kill = t_start + my_lock_wait_time * 1000 / 2;
    r = request_b.wait(my_lock_wait_time, my_killed_time, my_killed_callback);
    assert(r == DB_LOCK_NOTGRANTED);

    uint64_t t_end = toku_current_time_microsec();
    assert(t_end > t_start);
    uint64_t t_delta = t_end - t_start;
    // fprintf(stderr, "delta=%" PRIu64 "\n", t_delta);
    assert(t_delta >= my_lock_wait_time / 2);

    // fprintf(stderr, "killed_calls=%d\n", killed_calls);
    assert(killed_calls > 0);

    request_b.destroy();

    release_lock_and_retry_requests(lt, txnid_a, one, one);
    request_a.destroy();

    mgr.release_lt(lt);
    mgr.destroy();
}

} /* namespace toku */

int main(void) {
    toku::lock_request_unit_test test;
    test.test_wait_time_callback();
    return 0;
}

