串行端口。枚举和FIFO的控制。

通过研究Linux的线程机制和信号量实现读者写者(Reader-Writer)问题并发控制。 1)写-写互斥：不能有两个写者同时进行写操作； 2）读-写互斥：不能同时有一个线程在读，而另一个线程在写； 3）读-读允许：可以有一个或多个读者在读； 4）读者优先的附加限制：如果读者申请进行读操作时已有另一个读者正在进行读操作，则该读者可直接开始读操作； 5）写者优先的附加限制：如果一个读者申请进行读操作时已有另一个写者在等待访问共享资源，则该读者必须等到没有写者处于等待状态后才能开始读操作。 -By studying the Linux thread mechanism and semaphores realize readers who write (Reader-Writer) the issue of concurrency control. 1) to write- write mutex: Can not write at the same time there are two write operations 2) read- write mutex: Can not have a thread at the same time in reading and writing another thread 3) Reading- Reading of permit: can have one or more readers read 4) the priority of additional restrictions readers: If the readers apply for a read operation, there was another reader being read, the reader can be directly started reading operation 5) to write additional priority Restrictions: If an application for a reader reading write operation has been in waiting for another visit to a shared resource, the read

多幅图像合成的小例子 大家共同学习啊 有很大问题请大家帮助-image synthesis of a number of small examples of common learning ah there is a big problem Please Help

可添加、删除、列出试题答案、修改密码等功能-can add, delete, list answer questions, such as password change function

老师给的例子,我改过了, 可以运行.如果哪位大哥发现有 什么问题,请给我流言] lirence@163.com-teachers to the case, I turn over, can run. Which brother if found to have any problems, please give me a rumor] lirence@163.com

操作系统中会遇到银行家的问题-operating system will encounter the problem of bankers

一个用java实现的解决理发师睡觉问题的代码-used to achieve a solution to the problem of sleep Barber code

关于unix操作系统的最经典的一部电子英文版的书，主要含有关于unix环境下的经典编程-Unix operating system on the most classic of the English version of an electronic book, containing mainly on classic unix programming environment

SEAL是DOS 下的32位保护模式的GUI程序，它只能在DOS下才能运行。-SEAL is under the DOS protected mode 32 GUI program, it can only be run under DOS.

这是一个shell程序，模拟unix系统之下的。可以实现unix下的很多命令-This is a shell program to simulate the system under unix. Can be achieved under a lot of unix commands

操作系统课程设计-courses on operating system design