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// chrono -*- C++ -*-
// Copyright (C) 2008, 2009, 2010, 2011 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 <chrono>
#ifdef _GLIBCXX_USE_C99_STDINT_TR1
// conditional inclusion of sys/time.h for gettimeofday
#if !defined(_GLIBCXX_USE_CLOCK_MONOTONIC) && \
!defined(_GLIBCXX_USE_CLOCK_REALTIME) && \
defined(_GLIBCXX_USE_GETTIMEOFDAY)
#include <sys/time.h>
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
namespace chrono
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
constexpr bool system_clock::is_steady;
system_clock::time_point
system_clock::now() noexcept
{
#ifdef _GLIBCXX_USE_CLOCK_REALTIME
timespec tp;
// -EINVAL, -EFAULT
clock_gettime(CLOCK_REALTIME, &tp);
return time_point(duration(chrono::seconds(tp.tv_sec)
+ chrono::nanoseconds(tp.tv_nsec)));
#elif defined(_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);
return system_clock::from_time_t(__sec);
#endif
}
#ifdef _GLIBCXX_USE_CLOCK_MONOTONIC
constexpr bool steady_clock::is_steady;
steady_clock::time_point
steady_clock::now() noexcept
{
timespec tp;
// -EINVAL, -EFAULT
clock_gettime(CLOCK_MONOTONIC, &tp);
return time_point(duration(chrono::seconds(tp.tv_sec)
+ chrono::nanoseconds(tp.tv_nsec)));
}
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace chrono
} // namespace std
#endif // _GLIBCXX_USE_C99_STDINT_TR1
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