operating system操作系统-ch06-process synchronization- 6.3 6.4 6.5 6.6 Consumer while(true){while(count==0);//donothing nextConsumed=buffer[out];out=(out+1)%BUFFER_SIZE;count--;/*consumetheiteminnextConsumed} Count?!?!6.7 RaceCondition count++couldbeimplementedas register1=countregister1...
40、isables interrupts to implement short critical sections Linux provides: semaphores spin locks,Pthreads Synchronization,Pthreads API is OS-independent It provides: mutex locks condition variables Non-portable extensions include: read-write locks spin locks,6.9 Atomic Transactions,System Model Log-bas ...
OperatingSystem总结 授课章节 •Chapter5Threads•Chapter6CPUScheduling•Chapter7ProcessSynchronization•Chapter8Deadlocks•Chapter9MemoryManagement•Chapter10VirtualMemory•文件管理•设备管理 2020/7/3 5Threads •什么是线程•线程与进程的区别和联系•使用线程的优点 2020/7/3 6CPUScheduling •...
const void *shmaddr, int shmflg);int* data =shmat( shmid,NULL,0);/* Notice that 'void *' means returning a pointer which can be used to point to any type of data *//* shmat() attaches the System V shared memory segment identi‐ ...
synchronization of the activities of multiple processes allocation of processor time to processes. 2. What are three contexts in which concurrency arises? 并发出现的三种情况 Multiple applications,structured applications,operating-system structure.
Shivankur ThapliyalRenu BahugunaFoundation of Computer Science (FCS), NY, USA
c. The provision of mechanisms for process synchronization d. The provision of mechanisms for process communication e. The provision of mechanisms for deadlock handling 2.3 What are the three major activities of an operating system with regard to memory management?
And we have designed five practical projects which including designs and implementation of processor management, process synchronization and communication, memory management, file system and devices management corresponding program. Because of "Operating System" is MOOC course of School of Software, teachers...
操作系统(Operating System):是控制应用程序执行的程序,它充当用户和计算机之间的接口,并对计算机资源进行管理。 内核(kernel):OS常驻内存的部分,包含了操作系统中最常用的功能。 多道(multiprogramming):当一个程序(作业)被中断需要等待某些事件发生时,CPU可以切换到另一个可以立即运行的程序(作业),这种处理称为多道...
第二章作业系统概述Operating-Systems-OverviewPPT课件 第二章作業系統概述OperatingSystemsOverview 介紹作業系統的歷史、原理作業系統的目標和功能，如何由最初的批次系統(batchsystem)演進到複雜的多模式(multi-mode)與多使用者(multi-user)。- 1 2.1作業系統目標與功能 作業系統的角色：控制應用程式執行的程式。使用...