Files
scylladb/clocks-impl.cc
Piotr Sarna 05ec95134a clocks-impl: switch to thread-safe time conversion
std::gmtime() has a sad property of using a global static buffer
for returning its value. This is not thread-safe, so its usage
is replaced with gmtime_r, which can accept a local buffer.
While no regressions where observed in this particular area of code,
a similar bug caused failures in alternator, so it's better to simply
replace all std::gmtime calls with their thread-safe counterpart.

Message-Id: <39e91c74de95f8313e6bb0b12114bf12c0e79519.1588589151.git.sarna@scylladb.com>
2020-05-04 14:11:38 +03:00

42 lines
1.3 KiB
C++

/*
* Copyright (C) 2015 ScyllaDB
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla 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 Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#include <seastar/core/print.hh>
#include "db_clock.hh"
#include "timestamp.hh"
#include "clocks-impl.hh"
std::atomic<int64_t> clocks_offset;
std::ostream& operator<<(std::ostream& os, db_clock::time_point tp) {
auto t = db_clock::to_time_t(tp);
::tm t_buf;
return os << std::put_time(::gmtime_r(&t, &t_buf), "%Y/%m/%d %T");
}
std::string format_timestamp(api::timestamp_type ts) {
auto t = std::time_t(std::chrono::duration_cast<std::chrono::seconds>(api::timestamp_clock::duration(ts)).count());
::tm t_buf;
return format("{}", std::put_time(::gmtime_r(&t, &t_buf), "%Y/%m/%d %T"));
}