Chris@16: //  boost thread_clock.cpp  -----------------------------------------------------------//
Chris@16: 
Chris@101: //  Copyright Beman Dawes 1994, 2006, 2008
Chris@101: //  Copyright Vicente J. Botet Escriba 2009-2011
Chris@101: //  Copyright Christopher Brown 2013
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@101: #include <boost/chrono/thread_clock.hpp>
Chris@16: #include <cassert>
Chris@16: 
Chris@101: # include <pthread.h>
Chris@101: # include <mach/thread_act.h>
Chris@101: 
Chris@101: namespace boost { namespace chrono {
Chris@101: 
Chris@101:     thread_clock::time_point thread_clock::now( ) BOOST_NOEXCEPT
Chris@101:     {
Chris@101:         // get the thread port (borrowing pthread's reference)
Chris@101:         mach_port_t port = pthread_mach_thread_np(pthread_self());
Chris@101: 
Chris@101:         // get the thread info
Chris@101:         thread_basic_info_data_t info;
Chris@101:         mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
Chris@101:         if ( thread_info(port, THREAD_BASIC_INFO, (thread_info_t)&info, &count) != KERN_SUCCESS )
Chris@101:         {
Chris@101:             BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
Chris@101:             return time_point();
Chris@101:         }
Chris@101: 
Chris@101:         // convert to nanoseconds
Chris@101:         duration user = duration(
Chris@101:                 static_cast<thread_clock::rep>( info.user_time.seconds ) * 1000000000
Chris@101:                         + static_cast<thread_clock::rep>(info.user_time.microseconds ) * 1000);
Chris@101: 
Chris@101:         duration system = duration(
Chris@101:                 static_cast<thread_clock::rep>( info.system_time.seconds ) * 1000000000
Chris@101:                         + static_cast<thread_clock::rep>( info.system_time.microseconds ) * 1000);
Chris@101: 
Chris@101:         return time_point( user + system );
Chris@101:     }
Chris@101: 
Chris@101: #if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
Chris@101:     thread_clock::time_point thread_clock::now( system::error_code & ec )
Chris@101:     {
Chris@101:         // get the thread port (borrowing pthread's reference)
Chris@101:         mach_port_t port = pthread_mach_thread_np(pthread_self());
Chris@101: 
Chris@101:         // get the thread info
Chris@101:         thread_basic_info_data_t info;
Chris@101:         mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
Chris@101:         if ( thread_info(port, THREAD_BASIC_INFO, (thread_info_t)&info, &count) != KERN_SUCCESS )
Chris@101:         {
Chris@101:             if (BOOST_CHRONO_IS_THROWS(ec))
Chris@101:             {
Chris@101:                 boost::throw_exception(
Chris@101:                         system::system_error(
Chris@101:                                 EINVAL,
Chris@101:                                 BOOST_CHRONO_SYSTEM_CATEGORY,
Chris@101:                                 "chrono::thread_clock" ));
Chris@101:             }
Chris@101:             else
Chris@101:             {
Chris@101:                 ec.assign( errno, BOOST_CHRONO_SYSTEM_CATEGORY );
Chris@101:                 return time_point();
Chris@101:             }
Chris@101:         }
Chris@101:         if (!BOOST_CHRONO_IS_THROWS(ec))
Chris@101:         {
Chris@101:             ec.clear();
Chris@101:         }
Chris@101: 
Chris@101:         // convert to nanoseconds
Chris@101:         duration user = duration(
Chris@101:                 static_cast<thread_clock::rep>( info.user_time.seconds ) * 1000000000
Chris@101:                         + static_cast<thread_clock::rep>(info.user_time.microseconds ) * 1000);
Chris@101: 
Chris@101:         duration system = duration(
Chris@101:                 static_cast<thread_clock::rep>( info.system_time.seconds ) * 1000000000
Chris@101:                         + static_cast<thread_clock::rep>( info.system_time.microseconds ) * 1000);
Chris@101: 
Chris@101:         return time_point( user + system );
Chris@101:     }
Chris@101: #endif
Chris@101: } }