osfmk/man/semaphore_signal_all.html

   1 <h2>semaphore_signal_all</h2>
   2 <hr>
   3 <p>
   4 <strong>Function</strong> - Wake up all threads blocked on a semaphore.
   5 <h3>SYNOPSIS</h3>
   6 <pre>
   7 <strong>kern_return_t   semaphore_signal_all</strong>
   8                 <strong>(semaphore_t</strong>                          <var>semaphore</var><strong>);</strong>
   9 </pre>
  10 <h3>PARAMETERS</h3>
  11 <dl>
  12 <p>
  13 <dt> <var>semaphore</var>
  14 <dd>
  15 [in send right] The port naming the semaphore to be signalled.
  16 </dl>
  17 <h3>DESCRIPTION</h3>
  18 <p>
  19 The <strong>semaphore_signal_all</strong> function wakes up all of the
  20 threads blocked on the semaphore. The semaphore count is reset to
  21 zero.
  22 <h3>RETURN VALUES</h3>
  23 <dl>
  24 <p>
  25 <dt> <strong>KERN_INVALID_ARGUMENT</strong>
  26 <dd>
  27 The specified semaphore is invalid.
  28 <p>
  29 <dt> <strong>KERN_TERMINATED</strong>
  30 <dd>
  31 The specified semaphore has been destroyed.
  32 <p>
  33 <dt> <strong>KERN_SUCCESS</strong>
  34 <dd>
  35 The semaphore has been signalled.
  36 </dl>
  37 <h3>RELATED INFORMATION</h3>
  38 <p>
  39 Functions:
  40 <a href="semaphore_create.html"><strong>semaphore_create</strong></a>,
  41 <a href="semaphore_destroy.html"><strong>semaphore_destroy</strong></a>,
  42 <a href="semaphore_signal.html"><strong>semaphore_signal</strong></a>,