Be aware, if you hold a mutex in your combiner while dereferencing slot call iterators, you run the risk of deadlocks and recursive locking if any of the slots cause additional mutex locking to occur.

• 注意，如果您在您的合并器中持有互斥体，当插槽调用迭代器解引用时，如果有个插槽导致了额外的互斥锁的发生，你就会有死锁和递归锁的危险。