读者―写者问题的读写操作限制(包括读者优先和写者优先)： 1)写―写互斥，即不能有两个写者同时进行写操作。 2)读―写互斥，即不能同时有一个线程在读，而...

读者―写者问题的读写操作限制(包括读者优先和写者优先)： 1)写―写互斥，即不能有两个写者同时进行写操作。 2)读―写互斥，即不能同时有一个线程在读，而另一个线程在写。 3)读―读允许，即可以有一个或多个读者在读。 -readers-the problem was the restrictions on reading and writing operations (including readers wrote priority and priority) : 1) write-write mutex, and that is not written there were two parallel write. 2) read-write exclusive, and that is not also a thread reading, and writing in another thread. 3) Reading-time permitting, there may be one or more readers in Reading.