1<h2>host_get_clock_service</h2> 2<hr> 3<p> 4<strong>Function</strong> - Return a send right to a kernel clock's service port. 5<h3>SYNOPSIS</h3> 6<pre> 7<strong>kern_return_t host_get_clock_service</strong> 8 <strong>(host_t</strong> <var>host</var>, 9 <strong>clock_id_t</strong> <var>id</var>, 10 <strong>clock_t</strong> <var>clock_name</var><strong>);</strong> 11</pre> 12<h3>PARAMETERS</h3> 13<dl> 14<p> 15<dt> <var>host</var> 16<dd> 17[in host-name send right] 18The name (or control) port for the host 19owning the clock. 20<p> 21<dt> <var>id</var> 22<dd> 23[in scalar] 24The identification of the desired kernel clock. These values 25are defined in \*L<mach/clock_types.h>\*O. Although an implementation 26may define additional values, the following values are always defined 27(although only the REALTIME clock is required to be implemented): 28<dl> 29<p> 30<dt> <strong>REALTIME_CLOCK</strong> 31<dd> 32A moderate resolution clock service that (typically) tracks 33time since the system last boot. 34<p> 35<dt> <strong>BATTERY_CLOCK</strong> 36<dd> 37A (typically) low resolution clock (to the second) that 38survives power failures or service outages. 39<p> 40<dt> <strong>HIGHRES_CLOCK</strong> 41<dd> 42A high resolution clock. 43</dl> 44<p> 45<dt> <var>clock_name</var> 46<dd> 47[out clock-name send right] 48Name port for the clock. 49</dl> 50<h3>DESCRIPTION</h3> 51<p> 52The <strong>host_get_clock_service</strong> function returns a send 53right to the name port for a 54kernel clock object. This right is used to get the time and 55resolutions of the 56clock and to set clock alarms. 57<h3>RETURN VALUES</h3> 58<p> 59Only generic errors apply. 60<h3>RELATED INFORMATION</h3> 61<p> 62Functions: 63<a href="clock_get_time.html"><strong>clock_get_time</strong></a>, 64<a href="clock_get_attributes.html"><strong>clock_get_attributes</strong></a>, 65<a href="clock_map_time.html"><strong>clock_map_time</strong></a>, 66<a href="clock_sleep.html"><strong>clock_sleep</strong></a>, 67<a href="clock_alarm.html"><strong>clock_alarm</strong></a>, 68<a href="host_get_clock_control.html"><strong>host_get_clock_control</strong></a>. 69