xnu-7195.101.1.tar.gz

[apple/xnu.git] / osfmk / man / semaphore_destroy.html

<h2>semaphore_destroy</h2>
<hr>
<p>
<strong>Function</strong> - Destroy a semaphore.
<h3>SYNOPSIS</h3>
<pre>
<strong>kern_return_t   semaphore_destroy</strong>
                <strong>(task_t</strong>                                    <var>task</var>,
                 <strong>semaphore_t</strong>                          <var>semaphore</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<p>
<dt> <var>task</var>
<dd>
[in task port] The task associated with the target semaphore.
<p>
<dt> <var>semaphore</var>
<dd>
[in send right] The port naming the semaphore to be destroyed.
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>semaphore_destroy</strong> function destroys a semaphore.
All send rights
naming the semaphore become dead names. Threads waiting on the
semaphore become unblocked with the return from the
<strong>semaphore_wait</strong>
call indicating that the semaphore was destroyed. A call to
<strong>semaphore_destroy</strong> succeeds only if the semaphore is associated
with the specified task.
<h3>RETURN VALUES</h3>
<dl>
<p>
<dt> <strong>KERN_INVALID_ARGUMENT</strong>
<dd>
Either, or both, the task or semaphore arguments were invalid.
<p>
<dt> <strong>KERN_INVALID_RIGHT</strong>
<dd>
The specified task does not own the specified semaphore.
<p>
<dt> <strong>KERN_TERMINATED</strong>
<dd>
The specified semaphore was previously destroyed.
<p>
<dt> <strong>KERN_SUCCESS</strong>
<dd>
The semaphore was destroyed.
</dl>
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="semaphore_create.html"><strong>semaphore_create</strong></a>,
<a href="semaphore_signal.html"><strong>semaphore_signal</strong></a>,
<a href="semaphore_signal_all.html"><strong>semaphore_signal_all</strong></a>,
<a href="semaphore_wait.html"><strong>semaphore_wait</strong></a>,
<a href="device_get_status.html"><strong>device_get_status</strong></a>.