Struct StatusListener

pub struct StatusListener { /* private fields */ }

An object that listens for status changes.

~Deprecated: In new code consider using crate::host::descriptor::listener::StateEventSource, which supports Rust closures or directly takes crate::cshadow::StatusListener.

Implementations

impl StatusListener

pub unsafe fn clone_from_c(host: &Host, ptr: *mut StatusListener) -> Self

Create an owned reference from ptr. Reference count is incremented on creation, and decremented on Drop.

Safety

ptr must be safely dereferenceable.

pub fn new(host: &Host, notify: impl Fn(&Host) + Send + Sync + 'static) -> Self

Create a StatusListener with the given notification function.

pub fn handle_status_change( &self, host: &Host, current: FileState, transitions: FileState, )

Called when a transition (bit flip) occurred on at least one of its status bits. (This function should only be called by status owners, i.e., the descriptor or futex base classes.) If this listener is monitoring (via setMonitorStatus) any of the status bits that just transitioned, then this function will trigger a notification via the callback supplied to the new func.

pub fn set_monitor_status( &self, host: &Host, status: FileState, filter: StatusListenerFilter, )

Set the status bits that we should monitor for transitions (flips), and a filter that specifies which flips should cause the callback to be invoked.

Trait Implementations

impl Debug for StatusListener

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

Formats the value using the given formatter.

impl Drop for StatusListener

fn drop(&mut self)

Executes the destructor for this type.

impl Ord for StatusListener

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for StatusListener

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for StatusListener

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for StatusListener