Struct LogSinkRegistration 

pub struct LogSinkRegistration { /* private fields */ }

RAII guard that unregisters a LogSink from the singleton LogSinkCardSubscriber when dropped.

Returned by register_log_sink. The guard owns a strong Arc to the singleton subscriber and the monotonic id assigned at registration time. Drop removes the matching (id, LogSink) entry via Vec::retain.

Concurrency

Send + Sync. Drop::drop acquires the subscriber’s sinks mutex once, using the poison-recovery policy: a panic in another thread that left the lock poisoned does NOT prevent unregistration. The drop races safely with concurrent CardEventBus::publish fan-outs because the publisher takes a snapshot clone of the sinks vec before iterating; an in-flight publish may or may not observe the just-unregistered sink, but never deadlocks and never observes torn state.

Dropping the guard is O(N) in the number of registered sinks (typically == active session count). Callers must not hold the returned guard across .await points that could execute on a runtime worker also running the fan-out — with the current single-shot lock scope this is not a hazard.

Trait Implementations

impl Debug for LogSinkRegistration

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for LogSinkRegistration

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.