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// Compatibility symbols for previous versions, C++0x bits -*- C++ -*-
// Copyright (C) 2013-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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, or (at your option)
// any later version.
// This library 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
#include <bits/c++config.h>
#ifdef _GLIBCXX_USE_C99_STDINT_TR1
#ifdef _GLIBCXX_USE_GETTIMEOFDAY
#include <sys/time.h>
#endif
#define system_clock system_clockXX
#define steady_clock steady_clockXX
#include <chrono>
#undef system_clock
#undef steady_clock
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace chrono
{
// NB: Default configuration was no realtime.
struct system_clock
{
#ifdef _GLIBCXX_USE_GETTIMEOFDAY
typedef chrono::microseconds duration;
#else
typedef chrono::seconds duration;
#endif
typedef duration::rep rep;
typedef duration::period period;
typedef chrono::time_point<system_clock, duration> time_point;
static_assert(system_clock::duration::min()
< system_clock::duration::zero(),
"a clock's minimum duration cannot be less than its epoch");
static constexpr bool is_steady = false;
static time_point
now() noexcept;
};
constexpr bool system_clock::is_steady;
system_clock::time_point
system_clock::now() noexcept
{
#ifdef _GLIBCXX_USE_GETTIMEOFDAY
timeval tv;
// EINVAL, EFAULT
gettimeofday(&tv, 0);
return time_point(duration(chrono::seconds(tv.tv_sec)
+ chrono::microseconds(tv.tv_usec)));
#else
std::time_t __sec = std::time(0);
// This is the conversion done by system_clock::from_time_t(__sec)
typedef chrono::time_point<system_clock, seconds> __from;
return time_point_cast<system_clock::duration>
(__from(chrono::seconds(__sec)));
#endif
}
} // namespace chrono
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // _GLIBCXX_USE_C99_STDINT_TR1
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