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// posix/chrono.cpp --------------------------------------------------------------//
// Copyright Beman Dawes 2008
// Copyright Vicente J. Botet Escriba 2009
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
//----------------------------------------------------------------------------//
// POSIX //
//----------------------------------------------------------------------------//
#include <time.h> // for clock_gettime
namespace boost
{
namespace chrono
{
system_clock::time_point system_clock::now() BOOST_NOEXCEPT
{
timespec ts;
if ( ::clock_gettime( CLOCK_REALTIME, &ts ) )
{
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
}
return time_point(duration(
static_cast<system_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
system_clock::time_point system_clock::now(system::error_code & ec)
{
timespec ts;
if ( ::clock_gettime( CLOCK_REALTIME, &ts ) )
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
boost::throw_exception(
system::system_error(
errno,
BOOST_CHRONO_SYSTEM_CATEGORY,
"chrono::system_clock" ));
}
else
{
ec.assign( errno, BOOST_CHRONO_SYSTEM_CATEGORY );
return time_point();
}
}
if (!BOOST_CHRONO_IS_THROWS(ec))
{
ec.clear();
}
return time_point(duration(
static_cast<system_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
}
#endif
std::time_t system_clock::to_time_t(const system_clock::time_point& t) BOOST_NOEXCEPT
{
return static_cast<std::time_t>( t.time_since_epoch().count() / 1000000000 );
}
system_clock::time_point system_clock::from_time_t(std::time_t t) BOOST_NOEXCEPT
{
return time_point(duration(static_cast<system_clock::rep>(t) * 1000000000));
}
#ifdef BOOST_CHRONO_HAS_CLOCK_STEADY
steady_clock::time_point steady_clock::now() BOOST_NOEXCEPT
{
timespec ts;
if ( ::clock_gettime( CLOCK_MONOTONIC, &ts ) )
{
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
}
return time_point(duration(
static_cast<steady_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
steady_clock::time_point steady_clock::now(system::error_code & ec)
{
timespec ts;
if ( ::clock_gettime( CLOCK_MONOTONIC, &ts ) )
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
boost::throw_exception(
system::system_error(
errno,
BOOST_CHRONO_SYSTEM_CATEGORY,
"chrono::steady_clock" ));
}
else
{
ec.assign( errno, BOOST_CHRONO_SYSTEM_CATEGORY );
return time_point();
}
}
if (!BOOST_CHRONO_IS_THROWS(ec))
{
ec.clear();
}
return time_point(duration(
static_cast<steady_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
}
#endif
#endif
} // namespace chrono
} // namespace boost
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