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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program 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.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#pragma once
#include <memory>
#include <utility>
#include <vector>
#include "mongo/stdx/mutex.h"
#include "mongo/util/clock_source.h"
#include "mongo/util/time_support.h"
namespace mongo {
/**
* Mock clock source that returns a fixed time until explicitly advanced.
*/
class ClockSourceMock final : public ClockSource {
public:
/**
* Constructs a ClockSourceMock with the current time set to the Unix epoch.
*/
ClockSourceMock() {
_tracksSystemClock = false;
}
Milliseconds getPrecision() override;
Date_t now() override;
Status setAlarm(Date_t when, stdx::function<void()> action) override;
/**
* Advances the current time by the given value.
*/
void advance(Milliseconds ms);
/**
* Resets the current time to the given value.
*/
void reset(Date_t newNow);
private:
using Alarm = std::pair<Date_t, stdx::function<void()>>;
void _processAlarms(stdx::unique_lock<stdx::mutex> lk);
stdx::mutex _mutex;
Date_t _now;
std::vector<Alarm> _alarms;
};
class SharedClockSourceAdapter final : public ClockSource {
public:
explicit SharedClockSourceAdapter(std::shared_ptr<ClockSource> source)
: _source(std::move(source)) {
_tracksSystemClock = _source->tracksSystemClock();
}
Milliseconds getPrecision() override {
return _source->getPrecision();
}
Date_t now() override {
return _source->now();
}
Status setAlarm(Date_t when, stdx::function<void()> action) override {
return _source->setAlarm(when, std::move(action));
}
private:
std::shared_ptr<ClockSource> _source;
};
} // namespace mongo
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