Function parking_lot::unpark_one
[−]
[src]
pub unsafe fn unpark_one(key: usize, callback: &mut FnMut(UnparkResult)) -> UnparkResult
Unparks one thread from the queue associated with the given key.
The callback
function is called while the queue is locked and before the
target thread is woken up. The UnparkResult
argument to the function
indicates whether a thread was found in the queue and whether this was the
last thread in the queue. This value is also returned by unpark_one
.
Safety
You should only call this function with an address that you control, since you could otherwise interfere with the operation of other synchronization primitives.
The callback
function is called while the queue is locked and must not
panic or call into any function in parking_lot
.