Chris@16: //  boost thread_clock.cpp  -----------------------------------------------------------//
Chris@16: 
Chris@16: //  Copyright Beman Dawes 1994, 2006, 2008
Chris@16: //  Copyright Vicente J. Botet Escriba 2009-2011
Chris@16: 
Chris@16: //  Distributed under the Boost Software License, Version 1.0.
Chris@16: //  See http://www.boost.org/LICENSE_1_0.txt
Chris@16: 
Chris@16: //  See http://www.boost.org/libs/chrono for documentation.
Chris@16: 
Chris@16: //--------------------------------------------------------------------------------------//
Chris@16: 
Chris@16: #include <boost/chrono/config.hpp>
Chris@16: #include <boost/chrono/thread_clock.hpp>
Chris@16: #include <cassert>
Chris@16: 
Chris@16: #if !defined(__VXWORKS__)
Chris@16: # include <sys/times.h>
Chris@16: #endif
Chris@16: # include <pthread.h>
Chris@16: # include <unistd.h>
Chris@16: 
Chris@16: namespace boost { namespace chrono {
Chris@16: 
Chris@16:     thread_clock::time_point thread_clock::now( ) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:       struct timespec ts;
Chris@16: #if defined CLOCK_THREAD_CPUTIME_ID
Chris@16:         // get the timespec associated to the thread clock
Chris@16:         if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) )
Chris@16: #else
Chris@16:         // get the current thread
Chris@16:         pthread_t pth=pthread_self();
Chris@16:         // get the clock_id associated to the current thread
Chris@16:         clockid_t clock_id;
Chris@16:         pthread_getcpuclockid(pth, &clock_id);
Chris@16:         // get the timespec associated to the thread clock
Chris@16:         if ( ::clock_gettime( clock_id, &ts ) )
Chris@16: #endif
Chris@16:         {
Chris@16:           BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
Chris@16:         }
Chris@16: 
Chris@16:         // transform to nanoseconds
Chris@16:         return time_point(duration(
Chris@16:             static_cast<thread_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
Chris@16: 
Chris@16:     }
Chris@16: 
Chris@16: #if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
Chris@16:     thread_clock::time_point thread_clock::now( system::error_code & ec )
Chris@16:     {
Chris@16:       struct timespec ts;
Chris@16: #if defined CLOCK_THREAD_CPUTIME_ID
Chris@16:         // get the timespec associated to the thread clock
Chris@16:         if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) )
Chris@16: #else
Chris@16:         // get the current thread
Chris@16:         pthread_t pth=pthread_self();
Chris@16:         // get the clock_id associated to the current thread
Chris@16:         clockid_t clock_id;
Chris@16:         pthread_getcpuclockid(pth, &clock_id);
Chris@16:         // get the timespec associated to the thread clock
Chris@16:         if ( ::clock_gettime( clock_id, &ts ) )
Chris@16: #endif
Chris@16:         {
Chris@16:             if (BOOST_CHRONO_IS_THROWS(ec))
Chris@16:             {
Chris@16:                 boost::throw_exception(
Chris@16:                         system::system_error(
Chris@16:                                 errno,
Chris@16:                                 BOOST_CHRONO_SYSTEM_CATEGORY,
Chris@16:                                 "chrono::thread_clock" ));
Chris@16:             }
Chris@16:             else
Chris@16:             {
Chris@16:                 ec.assign( errno, BOOST_CHRONO_SYSTEM_CATEGORY );
Chris@16:                 return time_point();
Chris@16:             }
Chris@16:         }
Chris@16:         if (!BOOST_CHRONO_IS_THROWS(ec))
Chris@16:         {
Chris@16:             ec.clear();
Chris@16:         }
Chris@16:         // transform to nanoseconds
Chris@16:         return time_point(duration(
Chris@16:             static_cast<thread_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
Chris@16: 
Chris@16:     }
Chris@16: #endif
Chris@16: } }