pub type AtomicUnitOp = Box<dyn for<'w> FnOnce(&'w mut dyn SqlWriter) -> BoxFuture<'w, StorageResult<Box<dyn Any + Send>>> + Send>;Expand description
A caller-supplied unit of work to run as ONE atomic operation via
SqlAccess::atomic_unit (ADR-067 Component A, Fork C slice 2).
op receives a live &mut dyn SqlWriter already inside an open write
transaction — it must issue DML only (no bare BEGIN/COMMIT/
ROLLBACK; the caller-visible transaction boundary is owned entirely by
atomic_unit, exactly like the existing execute_batch contract) — and
returns its result type-erased via Box<dyn Any + Send> so this trait
method stays object-safe (no method-level generics on a trait used as
dyn SqlAccess). Callers downcast the returned box back to their own
concrete outcome type.
Aliased Type§
pub struct AtomicUnitOp(/* private fields */);