// Don't make other Acquire calls block on one that's doomed to fail.
		s.mu.Unlock()
		<-done
		return ctx.Err()
	}

	ready := make(chan struct{})
	w := waiter{n: n, ready: ready}
	elem := s.waiters.PushBack(w)
	s.mu.Unlock()

	select {
	case <-done:
		s.mu.Lock()
		select {
		case <-ready:
			// Acquired the semaphore after we were canceled.
			// Pretend we didn't and put the tokens back.
			s.cur -= n

	tail    []*wantConn
}

// len returns the number of items in the queue.
func (q *wantConnQueue) len() int {
	return len(q.head) - q.headPos + len(q.tail)
}

// pushBack adds w to the back of the queue.
func (q *wantConnQueue) pushBack(w *wantConn) {
	q.tail = append(q.tail, w)
}

// popFront removes and returns the wantConn at the front of the queue.
func (q *wantConnQueue) popFront() *wantConn {

	// lock.
	if atomic.Load(&gcBlackenEnabled) == 0 {
		unlock(&work.assistQueue.lock)
		return true
	}

	gp := getg()
	oldList := work.assistQueue.q
	work.assistQueue.q.pushBack(gp)

	// Recheck for background credit now that this G is in
	// the queue, but can still back out. This avoids a
	// race in case background marking has flushed more
	// credit since we checked above.

	}
	pInfo := obj.(*framework.QueuedPodInfo)
	pInfo.Attempts++
	p.schedulingCycle++
	// In flight, no concurrent events yet.
	if p.isSchedulingQueueHintEnabled {
		p.inFlightPods[pInfo.Pod.UID] = p.inFlightEvents.PushBack(pInfo.Pod)
	}

	// Update metrics and reset the set of unschedulable plugins for the next attempt.
	for plugin := range pInfo.UnschedulablePlugins.Union(pInfo.PendingPlugins) {

}

// push adds gp to the head of q.
func (q *gQueue) push(gp *g) {
	gp.schedlink = q.head
	q.head.set(gp)
	if q.tail == 0 {
		q.tail.set(gp)
	}
}

// pushBack adds gp to the tail of q.
func (q *gQueue) pushBack(gp *g) {
	gp.schedlink = 0
	if q.tail != 0 {
		q.tail.ptr().schedlink.set(gp)
	} else {
		q.head.set(gp)
	}
	q.tail.set(gp)
}

  SmallVector<Type, 4> while_input_types;
  while_input_values.push_back(const_true.getResult());
  while_input_types.push_back(const_true.getResult().getType());
  for (int i = 1; i < reduce_dataset.getNumOperands(); ++i) {
    while_input_values.push_back(reduce_dataset.getOperand(i));
    while_input_types.push_back(reduce_dataset.getOperand(i).getType());
  }

  // Initialize function arguments
  all_arguments_.push_back(OpArgumentView("AbstractContext*", "ctx"));
  for (const auto& arg : op_.Inputs()) {
    all_arguments_.push_back(OpArgumentView(arg));
  }
  for (const auto& arg : op_.Outputs()) {
    all_arguments_.push_back(OpArgumentView(arg));
  }
  for (const auto& attr : op.Attributes()) {
    all_arguments_.push_back(OpArgumentView(attr));
  }

      for (const auto& item : value.list().i())
        attrs.push_back(builder->getI64IntegerAttr(item));
      for (const auto& item : value.list().s())
        attrs.push_back(builder->getStringAttr(item));
      for (const auto& item : value.list().f())
        attrs.push_back(builder->getFloatAttr(builder->getF32Type(), item));
      for (const auto& item : value.list().b())
        attrs.push_back(builder->getBoolAttr(item));

    }
  }
  attrs.push_back(rewriter.getNamedAttr("lhs_quantization_axis",
                                        activation_quantization_axis));
  attrs.push_back(rewriter.getNamedAttr("rhs_quantization_axis",
                                        activation_quantization_axis));
  attrs.push_back(rewriter.getNamedAttr("output_quantization_axis",

    // Treats empty input shape as scalar
    if (dim_str.empty()) continue;
    if (dim_str == "?") {
      dims.push_back(-1);
      continue;
    }
    int size;
    TF_RET_CHECK(absl::SimpleAtoi(dim_str, &size));
    dims.push_back(size);
  }
  return dims;
}

static Status HandleSubtype(absl::string_view subtype,
                            ArrayInfo::SubTypeInfo* result) {