Struct Callbacks 

pub struct Callbacks {
    pub allocate: Option<fn(&Change)>,
    pub free: Option<fn(&Change)>,
    pub resize: Option<fn(&Change)>,
}

Handlers to install with set_callbacks, one per ChangeKind.

Plain fn pointers rather than closures on purpose: the C side keeps the registration until it is replaced, so anything captured would have to outlive the process. Route per-instance state through a static (an atomic counter, a channel sender in a OnceLock) instead.

Fields

allocate: Option<fn(&Change)>

Called after each successful allocation.

free: Option<fn(&Change)>

Called after each successful free.

resize: Option<fn(&Change)>

Called after each successful realloc.

Trait Implementations

impl Clone for Callbacks

fn clone(&self) -> Callbacks

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Callbacks

impl Debug for Callbacks

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

Formats the value using the given formatter.

impl Default for Callbacks

fn default() -> Callbacks

Returns the “default value” for a type.