一种基于Linux的数据共享模型的研究与实现

Research and implementation of a data-sharing model based on Linux

越来越多的工业控制项目都要求计算机的多个进程同时读取或修改该计算机不断收到的实时数据,这就带来了系统I/O的速度和系统资源的安全问题。基于此,提出了一种在Linux平台下基于双缓冲和强制访问控制机制的实时数据共享模型,并介绍了该模型主要用到的技术,最后给出了具体的实现方法。

As more and more industry controlling projects demanding for many processes in one computer reading and modifying the real-time data the computer receives, the problem of security and reliability is put forward. Based on this, the paper puts forward a real-time data model in order to improve the security and reliability of the system, expatiates the primary technologies the model adopted to, analyses the advantages of them, and gives the detailed implementation finally. The model is based on double buffer and mandatory access controlling （MAC）, combining with shared memory and semaphores.