mirror of
https://github.com/darlinghq/darling-xnu.git
synced 2024-11-27 06:20:34 +00:00
67 lines
2.0 KiB
HTML
67 lines
2.0 KiB
HTML
<h2>lock_handoff_accept</h2>
|
|
<hr>
|
|
<p>
|
|
<strong>Function</strong> - Accept a lock hand-off.
|
|
<h3>SYNOPSIS</h3>
|
|
<pre>
|
|
<strong>kern_return_t lock_handoff_accept</strong>
|
|
<strong>(lock_set_t</strong> <var>lock_set</var>,
|
|
<strong>int</strong> <var>lock_id</var><strong>);</strong>
|
|
</pre>
|
|
<h3>PARAMETERS</h3>
|
|
<dl>
|
|
<p>
|
|
<dt> <var>lock_set</var>
|
|
<dd>
|
|
[in send right] The port naming the lock set which represents the
|
|
lock.
|
|
<p>
|
|
<dt> <var>lock_id</var>
|
|
<dd>
|
|
[in scalar] The lock, represented by the lock set, that is the object
|
|
of the handoff operation.
|
|
</dl>
|
|
<h3>DESCRIPTION</h3>
|
|
<p>
|
|
The <strong>lock_handoff_accept</strong> function accepts a lock
|
|
hand-off from an anonymous sending thread. If the sending thread is
|
|
not waiting to hand-off the lock, the calling thread will block until
|
|
the lock handoff is completed. Only one thread may be waiting to
|
|
accept a lock handoff at any given time.
|
|
<h3>RETURN VALUES</h3>
|
|
<dl>
|
|
<p>
|
|
<dt> <strong>KERN_ALREADY_WAITING</strong>
|
|
<dd>
|
|
Another thread is already waiting for a hand-off of this lock.
|
|
<p>
|
|
<dt> <strong>KERN_INVALID_ARGUMENT</strong>
|
|
<dd>
|
|
The specified lock_set is invalid, or the lock_id is out of range.
|
|
<p>
|
|
<dt> <strong>KERN_SUCCESS</strong>
|
|
<dd>
|
|
The lock hand-off was successful.
|
|
<p>
|
|
<dt> <strong>KERN_LOCK_UNSTABLE</strong>
|
|
<dd>
|
|
The acquired lock has an unstable state.
|
|
<p>
|
|
<dt> <strong>KERN_LOCK_SET_DESTROYED</strong>
|
|
<dd>
|
|
The specified lock has been destroyed.
|
|
<p>
|
|
<dt> <strong>KERN_ABORTED</strong>
|
|
<dd>
|
|
While blocked to wait for the sending thread to transfer the lock's ownership,
|
|
the calling thread was awoken by an unrelated event;
|
|
the lock's handoff state is cleared.
|
|
</dl>
|
|
<h3>RELATED INFORMATION</h3>
|
|
<p>
|
|
Functions:
|
|
<a href="lock_acquire.html"><strong>lock_acquire</strong></a>,
|
|
<a href="lock_release.html"><strong>lock_release</strong></a>,
|
|
<a href="lock_try.html"><strong>lock_try</strong></a>,
|
|
<a href="lock_handoff.html"><strong>lock_handoff</strong></a>.
|