/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
#ident "Copyright (c) 2007-2012 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."

#include "lock_request_unit_test.h"

namespace toku {

// starting a lock request without immediate success should get
// stored in the lock request set as pending.
void lock_request_unit_test::test_start_pending(void) {
    int r;
    locktree::manager mgr;
    locktree *lt;
    lock_request request;
    // bogus, just has to be something.
    const uint64_t lock_wait_time = 0;

    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;
    TXNID txnid_b = 2001;

    const DBT *zero = get_dbt(0);
    const DBT *one = get_dbt(1);
    const DBT *two = get_dbt(2);

    // take a range lock using txnid b
    r = lt->acquire_write_lock(txnid_b, zero, two, nullptr);
    invariant_zero(r);

    locktree::lt_lock_request_info *info = lt->get_lock_request_info();

    // start a lock request for 1,1
    // it should fail. the request should be stored and in the pending state.
    request.create(lock_wait_time);
    request.set(lt, txnid_a, one, one, lock_request::type::WRITE);
    r = request.start();
    invariant(r == DB_LOCK_NOTGRANTED);
    invariant(info->pending_lock_requests.size() == 1);
    invariant(request.m_state == lock_request::state::PENDING);

    // should have made copies of the keys, and they should be equal
    invariant(request.m_left_key_copy.flags == DB_DBT_MALLOC);
    invariant(request.m_right_key_copy.flags == DB_DBT_MALLOC);
    invariant(compare_dbts(nullptr, &request.m_left_key_copy, one) == 0);
    invariant(compare_dbts(nullptr, &request.m_right_key_copy, one) == 0);

    // release the range lock for txnid b
    locktree_unit_test::locktree_test_release_lock(lt, txnid_b, zero, two);

    // now retry the lock requests.
    // it should transition the request to successfully complete.
    lock_request::retry_all_lock_requests(lt);
    invariant(info->pending_lock_requests.size() == 0);
    invariant(request.m_state == lock_request::state::COMPLETE);
    invariant(request.m_complete_r == 0);

    locktree_unit_test::locktree_test_release_lock(lt, txnid_a, one, one);

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

} /* namespace toku */

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

