Struct GroupGuard 

pub struct GroupGuard { /* private fields */ }

RAII scope guard for a group call on a single rank. Issues ncclGroupStart on construction; ncclGroupEnd on Drop if commit() was not called (errors logged but swallowed in Drop).

Implementations

impl GroupGuard

pub fn begin(tracker: Option<Arc<GroupTracker>>) -> Result<Self, GpuError>

Begin a group. If tracker is Some, increments tracker.begins on construction and tracker.ends on the matching end.

pub fn begin_inert(tracker: Option<Arc<GroupTracker>>) -> Self

Begin a group without invoking NCCL — for tests on hosts without a working NCCL install. Bumps the tracker but issues no FFI call.

pub fn commit(self) -> Result<(), GpuError>

End the group. Returns the FFI result. Subsequent Drop is a no-op.

Trait Implementations

impl Drop for GroupGuard

fn drop(&mut self)

Executes the destructor for this type.