1*fdd8201dSApple OSS Distributions<h2>lock_handoff_accept</h2> 2*fdd8201dSApple OSS Distributions<hr> 3*fdd8201dSApple OSS Distributions<p> 4*fdd8201dSApple OSS Distributions<strong>Function</strong> - Accept a lock hand-off. 5*fdd8201dSApple OSS Distributions<h3>SYNOPSIS</h3> 6*fdd8201dSApple OSS Distributions<pre> 7*fdd8201dSApple OSS Distributions<strong>kern_return_t lock_handoff_accept</strong> 8*fdd8201dSApple OSS Distributions <strong>(lock_set_t</strong> <var>lock_set</var>, 9*fdd8201dSApple OSS Distributions <strong>int</strong> <var>lock_id</var><strong>);</strong> 10*fdd8201dSApple OSS Distributions</pre> 11*fdd8201dSApple OSS Distributions<h3>PARAMETERS</h3> 12*fdd8201dSApple OSS Distributions<dl> 13*fdd8201dSApple OSS Distributions<p> 14*fdd8201dSApple OSS Distributions<dt> <var>lock_set</var> 15*fdd8201dSApple OSS Distributions<dd> 16*fdd8201dSApple OSS Distributions[in send right] The port naming the lock set which represents the 17*fdd8201dSApple OSS Distributionslock. 18*fdd8201dSApple OSS Distributions<p> 19*fdd8201dSApple OSS Distributions<dt> <var>lock_id</var> 20*fdd8201dSApple OSS Distributions<dd> 21*fdd8201dSApple OSS Distributions[in scalar] The lock, represented by the lock set, that is the object 22*fdd8201dSApple OSS Distributionsof the handoff operation. 23*fdd8201dSApple OSS Distributions</dl> 24*fdd8201dSApple OSS Distributions<h3>DESCRIPTION</h3> 25*fdd8201dSApple OSS Distributions<p> 26*fdd8201dSApple OSS DistributionsThe <strong>lock_handoff_accept</strong> function accepts a lock 27*fdd8201dSApple OSS Distributionshand-off from an anonymous sending thread. If the sending thread is 28*fdd8201dSApple OSS Distributionsnot waiting to hand-off the lock, the calling thread will block until 29*fdd8201dSApple OSS Distributionsthe lock handoff is completed. Only one thread may be waiting to 30*fdd8201dSApple OSS Distributionsaccept a lock handoff at any given time. 31*fdd8201dSApple OSS Distributions<h3>RETURN VALUES</h3> 32*fdd8201dSApple OSS Distributions<dl> 33*fdd8201dSApple OSS Distributions<p> 34*fdd8201dSApple OSS Distributions<dt> <strong>KERN_ALREADY_WAITING</strong> 35*fdd8201dSApple OSS Distributions<dd> 36*fdd8201dSApple OSS DistributionsAnother thread is already waiting for a hand-off of this lock. 37*fdd8201dSApple OSS Distributions<p> 38*fdd8201dSApple OSS Distributions<dt> <strong>KERN_INVALID_ARGUMENT</strong> 39*fdd8201dSApple OSS Distributions<dd> 40*fdd8201dSApple OSS DistributionsThe specified lock_set is invalid, or the lock_id is out of range. 41*fdd8201dSApple OSS Distributions<p> 42*fdd8201dSApple OSS Distributions<dt> <strong>KERN_SUCCESS</strong> 43*fdd8201dSApple OSS Distributions<dd> 44*fdd8201dSApple OSS DistributionsThe lock hand-off was successful. 45*fdd8201dSApple OSS Distributions<p> 46*fdd8201dSApple OSS Distributions<dt> <strong>KERN_LOCK_UNSTABLE</strong> 47*fdd8201dSApple OSS Distributions<dd> 48*fdd8201dSApple OSS DistributionsThe acquired lock has an unstable state. 49*fdd8201dSApple OSS Distributions<p> 50*fdd8201dSApple OSS Distributions<dt> <strong>KERN_LOCK_SET_DESTROYED</strong> 51*fdd8201dSApple OSS Distributions<dd> 52*fdd8201dSApple OSS DistributionsThe specified lock has been destroyed. 53*fdd8201dSApple OSS Distributions<p> 54*fdd8201dSApple OSS Distributions<dt> <strong>KERN_ABORTED</strong> 55*fdd8201dSApple OSS Distributions<dd> 56*fdd8201dSApple OSS DistributionsWhile blocked to wait for the sending thread to transfer the lock's ownership, 57*fdd8201dSApple OSS Distributions the calling thread was awoken by an unrelated event; 58*fdd8201dSApple OSS Distributions the lock's handoff state is cleared. 59*fdd8201dSApple OSS Distributions</dl> 60*fdd8201dSApple OSS Distributions<h3>RELATED INFORMATION</h3> 61*fdd8201dSApple OSS Distributions<p> 62*fdd8201dSApple OSS DistributionsFunctions: 63*fdd8201dSApple OSS Distributions<a href="lock_acquire.html"><strong>lock_acquire</strong></a>, 64*fdd8201dSApple OSS Distributions<a href="lock_release.html"><strong>lock_release</strong></a>, 65*fdd8201dSApple OSS Distributions<a href="lock_try.html"><strong>lock_try</strong></a>, 66*fdd8201dSApple OSS Distributions<a href="lock_handoff.html"><strong>lock_handoff</strong></a>. 67