osfmk/man/semaphore_signal_all.html

   1 <h2>semaphore_signal_all</h2>
<hr>
<p>
<strong>Function</strong> - Wake up all threads blocked on a semaphore.
<h3>SYNOPSIS</h3>
<pre>
<strong>kern_return_t   semaphore_signal_all</strong>
                <strong>(semaphore_t</strong>                          <var>semaphore</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<p>
<dt> <var>semaphore</var>
<dd>
[in send right] The port naming the semaphore to be signalled.
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>semaphore_signal_all</strong> function wakes up all of the
threads blocked on the semaphore. The semaphore count is reset to
zero.
<h3>RETURN VALUES</h3>
<dl>
<p>
<dt> <strong>KERN_INVALID_ARGUMENT</strong>
<dd>
The specified semaphore is invalid.
<p>
<dt> <strong>KERN_TERMINATED</strong>
<dd>
The specified semaphore has been destroyed.
<p>
<dt> <strong>KERN_SUCCESS</strong>
<dd>
The semaphore has been signalled.
</dl>
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="semaphore_create.html"><strong>semaphore_create</strong></a>,
<a href="semaphore_destroy.html"><strong>semaphore_destroy</strong></a>,
<a href="semaphore_signal.html"><strong>semaphore_signal</strong></a>,