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- // 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>
- #include <boost/assert.hpp>
- #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::system::system_category(),
- "chrono::thread_clock" ));
- }
- else
- {
- ec.assign( errno, ::boost::system::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
- } }
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