51becbde
 Peter M. Groen
Committed the ent...
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/* Copyright (C) 2019
*
* This file is part of the osdev components suite
*
* 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 2, or (at your option) any
* later version.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <chrono>
#include <type_traits>
// function std::chrono::ceil is added in the c++17 standard.
// Added implementation from https://en.cppreference.com/w/cpp/chrono/duration/ceil
// to this compatibility header. The header only defines this implementation when
// the c++ compiler is used with an older standard.
#if !defined __cpp_lib_chrono || __cpp_lib_chrono < 201611
namespace std {
namespace chrono {
template <class T>
struct is_duration : std::false_type
{
};
template <class Rep, class Period>
struct is_duration<
std::chrono::duration<Rep, Period>> : std::true_type
{
};
template <class To, class Rep, class Period,
class = typename enable_if<is_duration<To>{}>::type>
To ceil(const std::chrono::duration<Rep, Period>& d)
{
To t = std::chrono::duration_cast<To>(d);
if (t < d)
return t + To{ 1 };
return t;
}
} // End namespace chrono
} // End namespace std
#endif
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