35   std::mutex* mutex;  member
49   ret->mutex = new std::mutex;  in fixed_queue_new()
81   delete queue->mutex;  in fixed_queue_free()
99   std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_is_empty()
106   std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_length()
123     std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_enqueue()
137     std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_dequeue()
154     std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_try_enqueue()
169     std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_try_dequeue()
182   std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_try_peek_first()
189   std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_try_peek_last()
198     std::lock_guard<std::mutex> lock(*queue->mutex);  in fixed_queue_try_remove_from_queue()