avoid-deadlock

说明：  请求页式虚存管理是常用的虚拟存储管理方案之一。通过请求页式虚存管理中对页面置换算法的模拟，有助于理解虚拟存储技术的特点，并加深对请求页式虚存管理的页面调度算法的理解。(Page requests virtual memory management is commonly used in the virtual storage management, one of the options. Page through the request of the management of virtual memory page replacement algorithm for simulation, helping to understand the characteristics of virtual storage technology, and better understanding of the request for virtual memory management Page page scheduling algorithm understanding.)

操作系统作业源代码，方便学习操作系统课程的同学使用 (this is the codes for students who learn computer system.)

一个虚拟DOS操作界面的小系统，一共有9条命令，可以在里面增加命令实现更多功能。(A virtual DOS interface small system, a total of 9 orders, which increased in order to achieve more.)

这个程序是模拟采用二级目录结构的磁盘文件系统中的文件操作，它可以实现对文件的一些基本管理，如：读、写、删除文件等。通过这个程序可掌握文件子系统的原理，加深对二级目录结构的文件系统中用户管理、文件管理、目录管理的理解，并用程序实现对文件子系统的模拟。(the procedure is simulated using two disk directory structure of the file system file manipulation, it can be achieved on some basic document management, such as : read, write, delete files. Through this procedure can grasp the principle document subsystems to enhance the structure of the two file system user management, document management, directory management, understanding, and the procedures to achieve the right documents subsystem simulation.)

模拟段式存储管理的分配与回收，能够输入给定的内存大小，进程的个数，每个进程的段数及段大小；当某进程提出申请空间的大小后，显示能否满足申请，以及为该进程分配资源后有关内存空间使用的情况。 (Analog-stage distribution of storage management and recovery, be able to enter a given memory size, number of processes, each process segment number and segment size when a space the size of the application process, the show can meet the application, as well as the The process, after the allocation of resources relating to the use of memory space.)

FIFO和LRU页面置换算法，使用c++写的，有功能号，可以选择功能，进行相应的操作！(FIFO and LRU page replacement algorithm, using c++ written in the functional number, you can choose functions to carry out the appropriate action!)

说明：  ucos2 vc++移植代码 通过VC++编译，每2S显示一次任务(ucos2 vc++ code migration)

说明：  消费代码.用于操作系统中的课程设计使用.愿大家提供建议我也好改进算法(Consumer code. For the operating system to use the curriculum design. I would like to provide recommendations to improve the algorithm or)

大三操作系统的报告，完全包干，给需要的人(Third report of the operating system completely lump sum to those who need it)

页面置换先进先出算法，请大家试试，本人鉴定没问题(FIFO page replacement algorithm, please try, I did not identify the problem)