mach_port_allocate_name.html   [plain text]

<h2>mach_port_allocate_name</h2>
<hr>
<p>
<strong>Function</strong> - Create a port right with the caller-specified name.
<h3>SYNOPSIS</h3>
<pre>
<strong>kern_return_t   mach_port_allocate_name</strong>
                <strong>(ipc_space_t</strong>                               <var>task</var>,
                 <strong>mach_port_right_t</strong>                        <var>right</var>,
                 <strong>mach_port_name_t</strong>                          <var>name</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<p>
<dt> <var>task</var> 
<dd>
[in task send right]
The task acquiring the port right.
<p>
<dt> <var>right</var> 
<dd>
[in scalar]
The kind of entity to be created.  This is one of the following:
<dl>
<p>
<dt> <strong>MACH_PORT_RIGHT_RECEIVE</strong>
<dd>
<strong>mach_port_allocate_name</strong> creates a port.  The new port is 
not a member of any port set.  It doesn't have any extant send 
or send-once rights.  Its make-send count is zero, its sequence 
number is zero, its queue limit is <strong>MACH_PORT_QLIMIT_DEFAULT</strong>, 
and it has no queued messages. 
<var>name</var> denotes the receive right for the new port.
<var>task</var> does not hold send rights for the new port, only the
receive right.  <strong>mach_port_insert_right</strong> and
<strong>mach_port_extract_right</strong> can be used to convert the receive right into a 
combined send/receive right.
<p>
<dt> <strong>MACH_PORT_RIGHT_PORT_SET</strong>
<dd>
<strong>mach_port_allocate_name</strong> creates a port set.  The new port 
set has no members.
<p>
<dt> <strong>MACH_PORT_RIGHT_DEAD_NAME</strong>
<dd>
<strong>mach_port_allocate_name</strong> creates a dead name.  The new 
dead name has one user reference.
</dl>
<p>
<dt> <var>name</var> 
<dd>
[in scalar]
The task's name for the port right. name must not already be 
in use for some right, and it can't be the reserved values 
<strong>MACH_PORT_NULL</strong> and <strong>MACH_PORT_DEAD</strong>. 
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>mach_port_allocate_name</strong> function creates a new
right in the specified 
task, with a specified name for the new right.
<h3>NOTES</h3>
<p>
This interface is machine word length specific because of the port name
parameter.
<h3>RETURN VALUES</h3>
<dl>
<p>
<dt> <strong>KERN_NAME_EXISTS</strong>
<dd>
name was already in use for a port right.
</dl>
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="mach_port_allocate.html"><strong>mach_port_allocate</strong></a>,
<a href="mach_port_deallocate.html"><strong>mach_port_deallocate</strong></a>,
<a href="mach_port_insert_right.html"><strong>mach_port_insert_right</strong></a>,
<a href="mach_port_extract_right.html"><strong>mach_port_extract_right</strong></a>.