osfmk/man/mach_port_limits.html

   1 <h2>mach_port_limits</h2>
<hr>
<p>
<strong>Structure</strong> - Specifies a port's resource and message queue limits.
<h3>SYNOPSIS</h3>
<pre>
<strong>struct mach_port_limits</strong>
<strong>{</strong>
       <strong>mach_port_msgcount_t</strong>      <var>queue_limit</var><strong>;</strong>
<strong>};</strong>

<strong>typedef struct mach_port_limits* mach_port_limits_t;</strong>
</pre>
<h3>FIELDS</h3>
<dl>
<dt> <var>queue_limit</var>
<dd>
Number of messages allowed to be on the message queue at any given 
time.  Attempts to queue more messages than this limit will block.
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>mach_port_limits</strong> structure defines various limits
governing the messages that can be sent through the port. (In the current
implementation, the structure maintains only a queue length limit.)
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="mach_port_get_attributes.html"><strong>mach_port_get_attributes</strong></a>,
<a href="mach_port_set_attributes.html"><strong>mach_port_set_attributes</strong></a>.
<p>
Structures:
<a href="mach_port_qos.html"><strong>mach_port_qos</strong></a>.