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