process_system_cpu_clock::time_point process_system_cpu_clock::now(
system::error_code & ec)
{
// note that Windows uses 100 nanosecond ticks for FILETIME
boost::detail::win32::FILETIME_ creation, exit, user_time, system_time;
if ( boost::detail::win32::GetProcessTimes(
boost::detail::win32::GetCurrentProcess(), &creation, &exit,
&system_time, &user_time ) )
{
if (!BOOST_CHRONO_IS_THROWS(ec))
{
ec.clear();
}
return time_point(duration(
((static_cast<process_system_cpu_clock::rep>(system_time.dwHighDateTime) << 32)
| system_time.dwLowDateTime) * 100
));
}
else
{
boost::detail::win32::DWORD_ cause = boost::detail::win32::GetLastError();
if (BOOST_CHRONO_IS_THROWS(ec))
{
boost::throw_exception(
system::system_error(
cause,
BOOST_CHRONO_SYSTEM_CATEGORY,
"chrono::process_system_cpu_clock" ));
}
else
{
ec.assign( cause, BOOST_CHRONO_SYSTEM_CATEGORY );
return time_point();
}
}
}
process_cpu_clock::time_point process_cpu_clock::now(system::error_code & ec)
{
tms tm;
clock_t c = ::times(&tm);
if (c == clock_t(-1)) // error
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
pdalboost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_clock"));
} else
{
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
return time_point();
}
} else
{
long factor = chrono_detail::tick_factor();
if (factor != -1)
{
time_point::rep
r(c * factor, (tm.tms_utime + tm.tms_cutime) * factor, (tm.tms_stime
+ tm.tms_cstime) * factor);
return time_point(duration(r));
} else
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
pdalboost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_clock"));
} else
{
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
return time_point();
}
}
}
}
// never throws and set ec
static time_point now(boost::system::error_code & ec) {
if (BOOST_CHRONO_IS_THROWS(ec))
{
boost::throw_exception(
boost::system::system_error(
errno_,
BOOST_CHRONO_SYSTEM_CATEGORY,
"errored_clock"
)
);
}
ec.assign( errno_, BOOST_CHRONO_SYSTEM_CATEGORY );
return time_point();
};
/**
* Start the stopwatch.
*
* Effects: Assign the error code if any internal error occur while retrieving the current time.
* Effects: Gives the elapsed time since start time to the LapCollector if no internal error occurs.
*
* Throws: Any exception that the LapCollector can Throw.
*
* Post-conditions: !is_running() if no error occur.
*/
void stop(
system::error_code & ec
)
{
if (is_running())
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return;
laps_collector_.store(tmp - start_);
start_ = time_point(duration::zero());
running_ = false;
}
}
process_system_cpu_clock::time_point process_system_cpu_clock::now(system::error_code & ec)
{
tms tm;
clock_t c = ::times(&tm);
if (c == clock_t(-1)) // error
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
mars_boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_system_cpu_clock"));
} else
{
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
return time_point();
}
} else
{
long factor = chrono_detail::tick_factor();
if (factor != -1)
{
if (!BOOST_CHRONO_IS_THROWS(ec))
{
ec.clear();
}
return time_point(nanoseconds((tm.tms_stime + tm.tms_cstime) * factor));
} else
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
mars_boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_system_cpu_clock"));
} else
{
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
return time_point();
}
}
}
}
/**
* Elapsed time getter for the current lap.
*
* Effects: Assign the error code if any internal error occur while retrieving the current time.
*
* Returns: the elapsed time since the start if no internal error occur.
*
*/
duration elapsed_current_lap(
system::error_code & ec
) const
{
if (is_running())
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return duration::zero();
return tmp - start_;
} else
{
return duration::zero();
}
}
/**
* Restart the stopwatch.
*
* Effects: Assign the error code if any internal error occur while retrieving the current time.
* Effects: As if stop(); start() were called, but ensuring that the start time is the same as the stop time.
*
* Post-conditions: is_running() if no error occur.
*/
void restart(
system::error_code & ec
)
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return;
if (is_running())
{
laps_collector_.store(tmp - start_);
}
else
{
running_ = true;
}
start_ = tmp;
}