Struct CallbackHandle 

pub struct CallbackHandle { /* private fields */ }

Owns a resource that must be cleaned up when the owning TaskScope is dropped.

Currently used for signal subscriptions registered by the bind_* functions. When the TaskScope drops, every registered CallbackHandle is dropped, which calls the stored cleanup closure to unsubscribe from the signal.

Implementations

impl CallbackHandle

pub fn new(cleanup: impl FnOnce() + 'static) -> Self

Create a handle from a cleanup closure.

pub fn noop() -> Self

Create a no-op handle that does nothing on drop.

Useful as a placeholder when a CallbackHandle is required but no cleanup is needed — for example, in framework glue code that always calls register_callback_handle but whose inner binding may be a no-op.

Trait Implementations

impl Drop for CallbackHandle

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.