mirror of
https://github.com/scottlamb/moonfire-nvr.git
synced 2025-02-06 11:18:09 -05:00
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
// This file is part of Moonfire NVR, a security camera digital video recorder.
|
|
// Copyright (C) 2016 Scott Lamb <slamb@slamb.org>
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// In addition, 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 two.
|
|
//
|
|
// You must obey the GNU General Public License in all respects for all
|
|
// of the code used other than OpenSSL. 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 here.
|
|
//
|
|
// 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.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
//
|
|
// time.h: functions dealing with (wall) time.
|
|
|
|
#ifndef MOONFIRE_NVR_TIME_H
|
|
#define MOONFIRE_NVR_TIME_H
|
|
|
|
#include <math.h>
|
|
#include <time.h>
|
|
|
|
#include <mutex>
|
|
|
|
namespace moonfire_nvr {
|
|
|
|
constexpr long kNanos = 1000000000;
|
|
|
|
class WallClock {
|
|
public:
|
|
virtual ~WallClock() {}
|
|
virtual struct timespec Now() const = 0;
|
|
virtual void Sleep(struct timespec) = 0;
|
|
};
|
|
|
|
class SimulatedClock : public WallClock {
|
|
public:
|
|
SimulatedClock() : now_({0, 0}) {}
|
|
struct timespec Now() const final;
|
|
void Sleep(struct timespec req) final;
|
|
|
|
private:
|
|
mutable std::mutex mu_;
|
|
struct timespec now_;
|
|
};
|
|
|
|
inline struct timespec SecToTimespec(double sec) {
|
|
double intpart;
|
|
double fractpart = modf(sec, &intpart);
|
|
return {static_cast<time_t>(intpart), static_cast<long>(fractpart * kNanos)};
|
|
}
|
|
|
|
// Returns the real wall clock, which will never be deleted.
|
|
WallClock *GetRealClock();
|
|
|
|
} // namespace moonfire_nvr
|
|
|
|
#endif // MOONFIRE_NVR_TIME_H
|