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/* $Id: TimeStamp.h $ */
/** @file
* DHCP server - timestamps
*/
/*
* Copyright (C) 2017-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef VBOX_INCLUDED_SRC_Dhcpd_TimeStamp_h
#define VBOX_INCLUDED_SRC_Dhcpd_TimeStamp_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/string.h>
#include <iprt/time.h>
/*
* Timestamp API uses unsigned time, but we need to be able to refer
* to events in the past. Hide the ugly convertions.
*/
class TimeStamp
{
int64_t m_ns;
public:
TimeStamp()
: m_ns(0) {}
TimeStamp(uint64_t ns)
: m_ns(static_cast<int64_t>(ns)) {}
static TimeStamp now()
{
return TimeStamp(RTTimeNanoTS());
}
static TimeStamp absSeconds(int64_t sec)
{
RTTIMESPEC delta;
RTTimeNow(&delta);
RTTimeSpecSubSeconds(&delta, sec);
uint64_t stampNow = RTTimeNanoTS();
return TimeStamp(stampNow - RTTimeSpecGetNano(&delta));
}
TimeStamp &addSeconds(int64_t sec)
{
m_ns += sec * RT_NS_1SEC;
return *this;
}
TimeStamp &subSeconds(int64_t sec)
{
m_ns -= sec * RT_NS_1SEC;
return *this;
}
RTTIMESPEC *getAbsTimeSpec(RTTIMESPEC *pTime) const
{
RTTimeNow(pTime);
uint64_t stampNow = RTTimeNanoTS();
uint64_t delta = stampNow - m_ns;
RTTimeSpecSubNano(pTime, delta);
return pTime;
}
int64_t getAbsSeconds() const
{
RTTIMESPEC time;
return RTTimeSpecGetSeconds(getAbsTimeSpec(&time));
}
size_t absStrFormat(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput) const;
friend bool operator<(const TimeStamp &l, const TimeStamp &r);
friend bool operator>(const TimeStamp &l, const TimeStamp &r);
friend bool operator<=(const TimeStamp &l, const TimeStamp &r);
friend bool operator>=(const TimeStamp &l, const TimeStamp &r);
};
inline bool operator<(const TimeStamp &l, const TimeStamp &r) { return l.m_ns < r.m_ns; }
inline bool operator>(const TimeStamp &l, const TimeStamp &r) { return l.m_ns > r.m_ns; }
inline bool operator<=(const TimeStamp &l, const TimeStamp &r) { return l.m_ns <= r.m_ns; }
inline bool operator>=(const TimeStamp &l, const TimeStamp &r) { return l.m_ns >= r.m_ns; }
#endif /* !VBOX_INCLUDED_SRC_Dhcpd_TimeStamp_h */
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