1<h2>lock_try</h2> 2<hr> 3<p> 4<strong>Function</strong> - Attempt to acquire access rights to a lock. 5<h3>SYNOPSIS</h3> 6<pre> 7<strong>kern_return_t lock_try</strong> 8 <strong>(lock_set_t</strong> <var>lock_set</var>, 9 <strong>int</strong> <var>lock_id</var><strong>);</strong> 10</pre> 11<h3>PARAMETERS</h3> 12<dl> 13<p> 14<dt> <var>lock_set</var> 15<dd> 16[in send right] The port naming the lock set which represents the lock. 17<p> 18<dt> <var>lock_id</var> 19<dd> 20[in scalar] The lock, represented by the lock set, to be acquired. 21</dl> 22<h3>DESCRIPTION</h3> 23<p> 24The <strong>lock_try</strong> function attempts to acquire the specified lock without 25blocking. The return value indicates whether the lock was acquired. 26<h3>RETURN VALUES</h3> 27<dl> 28<p> 29<dt> <strong>KERN_INVALID_ARGUMENT</strong> 30<dd> 31The specified lock_set is invalid, or the lock_id is out of range. 32<p> 33<dt> <strong>KERN_SUCCESS</strong> 34<dd> 35The lock was acquired. 36<p> 37<dt> <strong>KERN_LOCK_UNSTABLE</strong> 38<dd> 39The acquired lock has an unstable state. 40<p> 41<dt> <strong>KERN_LOCK_SET_DESTROYED</strong> 42<dd> 43The specified lock has been destroyed. 44<p> 45<dt> <strong>KERN_LOCK_OWNED</strong> 46<dd> 47Another thread currently owns the requested lock. 48<p> 49<dt> <strong>KERN_LOCK_OWNED_SELF</strong> 50<dd> 51The calling thread already owns the lock. 52</dl> 53<h3>RELATED INFORMATION</h3> 54<p> 55Functions: 56<a href="lock_acquire.html"><strong>lock_acquire</strong></a>, 57<a href="lock_make_stable.html"><strong>lock_make_stable</strong></a>, 58<a href="lock_release.html"><strong>lock_release</strong></a>, 59<a href="lock_handoff.html"><strong>lock_handoff</strong></a>, 60<a href="lock_handoff_accept.html"><strong>lock_handoff_accept</strong></a>, 61<a href="lock_set_create.html"><strong>lock_set_create</strong></a>, 62<a href="lock_set_destroy.html"><strong>lock_set_destroy</strong></a>. 63