/*
* Document-method: num_waiting
* call-seq: num_waiting
*
* Returns the number of threads waiting on the queue.
*
*/
static VALUE
rb_queue_num_waiting(VALUE self)
{
Queue *queue;
VALUE result;
Data_Get_Struct(self, Queue, queue);
lock_mutex(&queue->mutex);
result = ULONG2NUM(queue->value_available.waiting.size +
queue->space_available.waiting.size);
unlock_mutex(&queue->mutex);
return result;
}