| // boost thread_clock.cpp -----------------------------------------------------------// |
| |
| // Copyright Beman Dawes 1994, 2006, 2008 |
| // Copyright Vicente J. Botet Escriba 2009-2011 |
| |
| // Distributed under the Boost Software License, Version 1.0. |
| // See http://www.boost.org/LICENSE_1_0.txt |
| |
| // See http://www.boost.org/libs/chrono for documentation. |
| |
| //--------------------------------------------------------------------------------------// |
| |
| #include <boost/chrono/config.hpp> |
| #include <boost/chrono/thread_clock.hpp> |
| #include <cassert> |
| |
| #if !defined(__VXWORKS__) |
| # include <sys/times.h> |
| #endif |
| # include <pthread.h> |
| # include <unistd.h> |
| |
| namespace boost { namespace chrono { |
| |
| thread_clock::time_point thread_clock::now( ) BOOST_NOEXCEPT |
| { |
| struct timespec ts; |
| #if defined CLOCK_THREAD_CPUTIME_ID |
| // get the timespec associated to the thread clock |
| if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) ) |
| #else |
| // get the current thread |
| pthread_t pth=pthread_self(); |
| // get the clock_id associated to the current thread |
| clockid_t clock_id; |
| pthread_getcpuclockid(pth, &clock_id); |
| // get the timespec associated to the thread clock |
| if ( ::clock_gettime( clock_id, &ts ) ) |
| #endif |
| { |
| BOOST_ASSERT(0 && "Boost::Chrono - Internal Error"); |
| } |
| |
| // transform to nanoseconds |
| return time_point(duration( |
| static_cast<thread_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec)); |
| |
| } |
| |
| #if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING |
| thread_clock::time_point thread_clock::now( system::error_code & ec ) |
| { |
| struct timespec ts; |
| #if defined CLOCK_THREAD_CPUTIME_ID |
| // get the timespec associated to the thread clock |
| if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) ) |
| #else |
| // get the current thread |
| pthread_t pth=pthread_self(); |
| // get the clock_id associated to the current thread |
| clockid_t clock_id; |
| pthread_getcpuclockid(pth, &clock_id); |
| // get the timespec associated to the thread clock |
| if ( ::clock_gettime( clock_id, &ts ) ) |
| #endif |
| { |
| if (BOOST_CHRONO_IS_THROWS(ec)) |
| { |
| boost::throw_exception( |
| system::system_error( |
| errno, |
| BOOST_CHRONO_SYSTEM_CATEGORY, |
| "chrono::thread_clock" )); |
| } |
| else |
| { |
| ec.assign( errno, BOOST_CHRONO_SYSTEM_CATEGORY ); |
| return time_point(); |
| } |
| } |
| if (!BOOST_CHRONO_IS_THROWS(ec)) |
| { |
| ec.clear(); |
| } |
| // transform to nanoseconds |
| return time_point(duration( |
| static_cast<thread_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec)); |
| |
| } |
| #endif |
| } } |