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88 lines
2.8 KiB
88 lines
2.8 KiB
// boost thread_clock.cpp -----------------------------------------------------------// |
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// Copyright Beman Dawes 1994, 2006, 2008 |
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// Copyright Vicente J. Botet Escriba 2009-2011 |
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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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// See http://www.boost.org/libs/chrono for documentation. |
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//--------------------------------------------------------------------------------------// |
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#include <boost/chrono/config.hpp> |
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#include <boost/chrono/thread_clock.hpp> |
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#include <cassert> |
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# include <sys/times.h> |
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# include <unistd.h> |
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namespace boost { namespace chrono { |
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thread_clock::time_point thread_clock::now( ) BOOST_CHRONO_NOEXCEPT |
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{ |
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struct timespec ts; |
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#if defined CLOCK_THREAD_CPUTIME_ID |
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// get the timespec associated to the thread clock |
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if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) ) |
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#else |
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// get the current thread |
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pthread_t pth=pthread_self(); |
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// get the clock_id associated to the current thread |
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clockid_t clock_id; |
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pthread_getcpuclockid(pth, &clock_id); |
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// get the timespec associated to the thread clock |
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if ( ::clock_gettime( clock_id, &ts ) ) |
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#endif |
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{ |
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BOOST_ASSERT(0 && "Boost::Chrono - Internal Error"); |
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} |
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// transform to nanoseconds |
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return time_point(duration( |
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static_cast<thread_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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thread_clock::time_point thread_clock::now( system::error_code & ec ) |
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{ |
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struct timespec ts; |
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#if defined CLOCK_THREAD_CPUTIME_ID |
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// get the timespec associated to the thread clock |
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if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) ) |
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#else |
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// get the current thread |
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pthread_t pth=pthread_self(); |
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// get the clock_id associated to the current thread |
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clockid_t clock_id; |
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pthread_getcpuclockid(pth, &clock_id); |
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// get the timespec associated to the thread clock |
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if ( ::clock_gettime( clock_id, &ts ) ) |
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#endif |
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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::thread_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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// transform to nanoseconds |
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return time_point(duration( |
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static_cast<thread_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec)); |
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} |
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#endif |
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} }
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