osfmk/man/clock_get_attributes.html

   1 <h2>clock_get_attributes</h2>
<hr>
<p>
<strong>Function</strong> - Return attributes of a clock.
<h3>SYNOPSIS</h3>
<pre>
<strong>kern_return_t   clock_get_attributes</strong>
                <strong>(clock_t</strong>                             <var>clock_name</var>,
                 <strong>clock_flavor_t</strong>                          <var>flavor</var>,
                 <strong>clock_attr_t</strong>                         <var>attribute</var>,
                 <strong>mach_msg_type_number_t</strong>         <var>attribute_count</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<p>
<dt> <var>clock_name</var> 
<dd>
[in clock-name send right]
The name (or control) port for the clock.
<p>
<dt> <var>flavor</var> 
<dd>
[in scalar]
Type of information desired.  Defined values are:
<dl>
<p>
<dt> <strong>CLOCK_GET_TIME_RES</strong>
<dd>
The resolution, in nanoseconds, with which the value returned 
by <strong>clock_get_time</strong> is updated.
<p>
<dt> <strong>CLOCK_MAP_TIME_RES</strong>
<dd>
The resolution, in nanoseconds, with which the value visible 
via <strong>clock_map_time</strong> is updated.
<p>
<dt> <strong>CLOCK_ALARM_CURRES</strong>
<dd>
The resolution, in nanoseconds, at which clock alarm and 
sleep timers are currently serviced.
<p>
<dt> <strong>CLOCK_ALARM_MINRES</strong>
<dd>
The minimum resolution, in nanoseconds, at which clock 
alarm and sleep timers can be serviced.
<p>
<dt> <strong>CLOCK_ALARM_MAXRES</strong>
<dd>
The maximum resolution, in nanoseconds, at which clock 
alarm and sleep timers can be serviced.
</dl>
<p>
<dt> <var>attribute</var> 
<dd>
[out scalar]
The returned attribute.
<p>
<dt> <var>attribute_count</var> 
<dd>
[in/out scalar]
On input, the maximum size of the buffer; on output, the 
size returned (in natural-sized units).
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>clock_get_attributes</strong> function returns attributes of a clock's
implementation or operation.
<h3>RETURN VALUES</h3>
<p>
Only generic errors apply.
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="host_get_clock_service.html"><strong>host_get_clock_service</strong></a>,
<a href="clock_get_time.html"><strong>clock_get_time</strong></a>,
<a href="clock_map_time.html"><strong>clock_map_time</strong></a>,
<a href="clock_sleep.html"><strong>clock_sleep</strong></a>,
<a href="clock_alarm.html"><strong>clock_alarm</strong></a>,
<a href="clock_set_attributes.html"><strong>clock_set_attributes</strong></a>.