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construct/include/ircd/date.h

84 lines
2.2 KiB
C++

/*
* Copyright (C) 2016 Charybdis Development Team
* Copyright (C) 2016 Jason Volk <jason@zemos.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#pragma once
#define HAVE_IRCD_UTIL_DATE_H
namespace ircd
{
using microtime_t = std::pair<time_t, int32_t>;
microtime_t microtime();
ssize_t microtime(char *const &buf, const size_t &size);
std::ostream &operator<<(std::ostream &, const microtime_t &);
template<class resolution = std::chrono::seconds> resolution now();
template<class resolution = std::chrono::seconds> time_t time();
}
template<class resolution>
time_t
ircd::time()
{
return now<resolution>().count();
}
template<class resolution>
resolution
ircd::now()
{
const auto now
{
std::chrono::system_clock::now()
};
const auto tse
{
now.time_since_epoch()
};
return std::chrono::duration_cast<resolution>(tse);
}
inline std::ostream &
ircd::operator<<(std::ostream &s, const microtime_t &t)
{
char buf[64];
const size_t len(microtime(buf, sizeof(buf)));
s << string_view{buf, len};
return s;
}
inline ssize_t
ircd::microtime(char *const &buf,
const size_t &size)
{
const auto mt(microtime());
return snprintf(buf, size, "%zd.%06d", mt.first, mt.second);
}
inline ircd::microtime_t
ircd::microtime()
{
struct timeval tv;
gettimeofday(&tv, nullptr);
return { tv.tv_sec, tv.tv_usec };
}