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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/util/clock_source_mock.h"
#include <algorithm>
namespace mongo {
Milliseconds ClockSourceMock::getPrecision() {
return Milliseconds(1);
}
Date_t ClockSourceMock::now() {
stdx::lock_guard<stdx::mutex> lk(_mutex);
return _now;
}
void ClockSourceMock::advance(Milliseconds ms) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
_now += ms;
_processAlarms(std::move(lk));
}
void ClockSourceMock::reset(Date_t newNow) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
_now = newNow;
_processAlarms(std::move(lk));
}
Status ClockSourceMock::setAlarm(Date_t when, unique_function<void()> action) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
if (when <= _now) {
lk.unlock();
action();
return Status::OK();
}
_alarms.emplace_back(std::make_pair(when, std::move(action)));
return Status::OK();
}
void ClockSourceMock::_processAlarms(stdx::unique_lock<stdx::mutex> lk) {
using std::swap;
invariant(lk.owns_lock());
std::vector<Alarm> readyAlarms;
auto alarmIsNotExpired = [&](const Alarm& alarm) { return alarm.first > _now; };
auto expiredAlarmsBegin = std::partition(_alarms.begin(), _alarms.end(), alarmIsNotExpired);
std::move(expiredAlarmsBegin, _alarms.end(), std::back_inserter(readyAlarms));
_alarms.erase(expiredAlarmsBegin, _alarms.end());
lk.unlock();
for (const auto& alarm : readyAlarms) {
alarm.second();
}
}
} // namespace mongo
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