avoid-deadlock

1．虚拟存储器的引入 局部性原理：程序在执行时在一较短时间内仅限于某个部分；相应的，它所访问的存储空间也局限于某个区域，它主要表现在以下两个方面：时间局限性和空间局限性。 2．虚拟存储器的定义 虚拟存储器是只具有请求调入功能和置换功能，能从逻辑上对内存容量进行扩充的一种存储器系统 (1. The introduction of virtual memory locality principle: program execution in a relatively short period of time limited to a particular part of it Accordingly, it has access to the storage space is also limited to a particular region, it is mainly manifested in the following two aspects: the time limitations and space limitations. 2. The definition of virtual memory Virtual memory is just a request for redeployment of functions and displacement functions, from the logical to expand the memory capacity of a memory system)

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)

UG开发代码,开发型材的代码,UG对话框的源文件,可以参考(UG)

MFC实现的，界面有好，实现了进程调度的算法 能够模拟操作系统的进程调度 适合初学者(MFC implementation, the interface is good, a process scheduling algorithm to achieve To simulate the operating system process scheduling for beginners)

这是我做的操作系统里面的银行家算法的源程序，发上来供大家参考。(caozuoxitongyinhangjiasuanfa)

计科操作系统课程“读者写者”问题的经典解决。(Branch of the operating system programs, " wrote the reader" as a problem to solve classic.)

说明：  用标准C实现shell功能,是操作系统的作业，Linux里面的she(Shell to achieve using standard C function, the operation is the operating system, Linux inside she)

1）设计一程序，由一个进程创建三个子进程，三个子进程一个是生产者进程，两个是消费者进程。 2）父子进程都使用父进程创建的共享存储区进行通信，由生产者进程将一个数组中的十个数值发送到由5个缓冲区组成的共享内存中。? 3）两个消费者进程轮流接收并输出这十个数值，同时将两个消费者进程读出的数值进行累加求各和。 4）考虑生产者进程生产的速度和消费者进程速度。(1) a program is designed to create three sub processes from one process, three sub processes is the producer process, and the two is the consumer process. 2) the father child process communicates with the shared storage area created by the parent process, and sends ten values in one array to the shared memory composed of 5 buffers by the producer process. L 3) the two consumer processes take turns to receive and output the ten values, and add values to each of the two consumer processes. 4) take into account the production speed of the producer process and the speed of the consumer process.)

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.)

HPA就是host protect area(HPA is the host protect area)