void AbstractOplogFetcher::_finishCallback(Status status) {
invariant(isActive());
_onShutdownCallbackFn(status);
decltype(_onShutdownCallbackFn) onShutdownCallbackFn;
stdx::lock_guard<stdx::mutex> lock(_mutex);
_transitionToComplete_inlock();
// Release any resources that might be held by the '_onShutdownCallbackFn' function object.
// The function object will be destroyed outside the lock since the temporary variable
// 'onShutdownCallbackFn' is declared before 'lock'.
invariant(_onShutdownCallbackFn);
std::swap(_onShutdownCallbackFn, onShutdownCallbackFn);
}
void OplogFetcher::_onShutdown(Status status, OpTimeWithHash opTimeWithHash) {
_onShutdownCallbackFn(status, opTimeWithHash);
}