Struct Turn 

pub struct Turn { /* private fields */ }

One thread’s turn at a lock path within this process; the next waiter in line gets it when this drops.

An advisory file lock polled with a deadline is no queue: threads of one process that take the same lock back to back make a waiter’s deadline count every critical section ahead of it, so eight writers whose writes each take a second (an fsync plus a Windows replace that waits out a scanner) fail the last one after five seconds although every holder made progress. The turn queues the threads of a process in arrival order, and a waiter’s timeout counts only time in which no turn was handed over: a holder that never returns still fails every waiter after timeout, a queue that moves fails nobody. Other processes are still bounded by the file lock itself.

Trait Implementations

impl Drop for Turn

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.