Enum PostOutcome 

pub enum PostOutcome {
    Appended {
        first_event: bool,
    },
    Replaced,
    Collapsed,
    Closed,
}

What EventSink::post did, for the caller to account for. The queue applies every change to its own state itself (it is the single owner); this reports the part that lives outside it — the dropped-monitor-event counter.

Variants

Appended

C append branch (dbEvent.c:832-852): the event took a new ring entry. first_event mirrors C’s firstEventFlag — the ring was empty before this post.

Fields

first_event: bool

Replaced

C replace branch (dbEvent.c:812-827): the monitor already had an entry queued and the queue is in flow control or within EVENTSPERQUE of full, so *pLastLog was overwritten. The displaced value is never delivered — one lost monitor event (C nreplace).

Collapsed

C early-drop branch (dbEvent.c:786-799): this subscription keeps only its latest entry because it carries values too wide for C’s union native_value, and one was already pending. Depth did not grow. Not counted in nreplace — C does not count it either.

Closed

The subscription is gone (reader dropped, or never attached). Nothing was queued — the mpsc::Sender::try_send-on-closed-channel case.

Trait Implementations

impl Clone for PostOutcome

fn clone(&self) -> PostOutcome

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PostOutcome

impl Debug for PostOutcome

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

Formats the value using the given formatter.

impl Eq for PostOutcome

impl PartialEq for PostOutcome

fn eq(&self, other: &PostOutcome) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for PostOutcome