1*0f4c859eSApple OSS Distributions<h2>host_get_clock_service</h2> 2*0f4c859eSApple OSS Distributions<hr> 3*0f4c859eSApple OSS Distributions<p> 4*0f4c859eSApple OSS Distributions<strong>Function</strong> - Return a send right to a kernel clock's service port. 5*0f4c859eSApple OSS Distributions<h3>SYNOPSIS</h3> 6*0f4c859eSApple OSS Distributions<pre> 7*0f4c859eSApple OSS Distributions<strong>kern_return_t host_get_clock_service</strong> 8*0f4c859eSApple OSS Distributions <strong>(host_t</strong> <var>host</var>, 9*0f4c859eSApple OSS Distributions <strong>clock_id_t</strong> <var>id</var>, 10*0f4c859eSApple OSS Distributions <strong>clock_t</strong> <var>clock_name</var><strong>);</strong> 11*0f4c859eSApple OSS Distributions</pre> 12*0f4c859eSApple OSS Distributions<h3>PARAMETERS</h3> 13*0f4c859eSApple OSS Distributions<dl> 14*0f4c859eSApple OSS Distributions<p> 15*0f4c859eSApple OSS Distributions<dt> <var>host</var> 16*0f4c859eSApple OSS Distributions<dd> 17*0f4c859eSApple OSS Distributions[in host-name send right] 18*0f4c859eSApple OSS DistributionsThe name (or control) port for the host 19*0f4c859eSApple OSS Distributionsowning the clock. 20*0f4c859eSApple OSS Distributions<p> 21*0f4c859eSApple OSS Distributions<dt> <var>id</var> 22*0f4c859eSApple OSS Distributions<dd> 23*0f4c859eSApple OSS Distributions[in scalar] 24*0f4c859eSApple OSS DistributionsThe identification of the desired kernel clock. These values 25*0f4c859eSApple OSS Distributionsare defined in \*L<mach/clock_types.h>\*O. Although an implementation 26*0f4c859eSApple OSS Distributionsmay define additional values, the following values are always defined 27*0f4c859eSApple OSS Distributions(although only the REALTIME clock is required to be implemented): 28*0f4c859eSApple OSS Distributions<dl> 29*0f4c859eSApple OSS Distributions<p> 30*0f4c859eSApple OSS Distributions<dt> <strong>REALTIME_CLOCK</strong> 31*0f4c859eSApple OSS Distributions<dd> 32*0f4c859eSApple OSS DistributionsA moderate resolution clock service that (typically) tracks 33*0f4c859eSApple OSS Distributionstime since the system last boot. 34*0f4c859eSApple OSS Distributions<p> 35*0f4c859eSApple OSS Distributions<dt> <strong>BATTERY_CLOCK</strong> 36*0f4c859eSApple OSS Distributions<dd> 37*0f4c859eSApple OSS DistributionsA (typically) low resolution clock (to the second) that 38*0f4c859eSApple OSS Distributionssurvives power failures or service outages. 39*0f4c859eSApple OSS Distributions<p> 40*0f4c859eSApple OSS Distributions<dt> <strong>HIGHRES_CLOCK</strong> 41*0f4c859eSApple OSS Distributions<dd> 42*0f4c859eSApple OSS DistributionsA high resolution clock. 43*0f4c859eSApple OSS Distributions</dl> 44*0f4c859eSApple OSS Distributions<p> 45*0f4c859eSApple OSS Distributions<dt> <var>clock_name</var> 46*0f4c859eSApple OSS Distributions<dd> 47*0f4c859eSApple OSS Distributions[out clock-name send right] 48*0f4c859eSApple OSS DistributionsName port for the clock. 49*0f4c859eSApple OSS Distributions</dl> 50*0f4c859eSApple OSS Distributions<h3>DESCRIPTION</h3> 51*0f4c859eSApple OSS Distributions<p> 52*0f4c859eSApple OSS DistributionsThe <strong>host_get_clock_service</strong> function returns a send 53*0f4c859eSApple OSS Distributionsright to the name port for a 54*0f4c859eSApple OSS Distributionskernel clock object. This right is used to get the time and 55*0f4c859eSApple OSS Distributionsresolutions of the 56*0f4c859eSApple OSS Distributionsclock and to set clock alarms. 57*0f4c859eSApple OSS Distributions<h3>RETURN VALUES</h3> 58*0f4c859eSApple OSS Distributions<p> 59*0f4c859eSApple OSS DistributionsOnly generic errors apply. 60*0f4c859eSApple OSS Distributions<h3>RELATED INFORMATION</h3> 61*0f4c859eSApple OSS Distributions<p> 62*0f4c859eSApple OSS DistributionsFunctions: 63*0f4c859eSApple OSS Distributions<a href="clock_get_time.html"><strong>clock_get_time</strong></a>, 64*0f4c859eSApple OSS Distributions<a href="clock_get_attributes.html"><strong>clock_get_attributes</strong></a>, 65*0f4c859eSApple OSS Distributions<a href="clock_map_time.html"><strong>clock_map_time</strong></a>, 66*0f4c859eSApple OSS Distributions<a href="clock_sleep.html"><strong>clock_sleep</strong></a>, 67*0f4c859eSApple OSS Distributions<a href="clock_alarm.html"><strong>clock_alarm</strong></a>, 68*0f4c859eSApple OSS Distributions<a href="host_get_clock_control.html"><strong>host_get_clock_control</strong></a>. 69