提高Ada并发效率的一种途径  

APPROACH TO IMPROVING Ada CONCURRENT EFFICIENCY

作　　者：赵恒[1] 王振宇[1] 

机构地区：[1]武汉数字工程研究所,武汉430074

出　　处：《计算机应用与软件》2001年第8期29-31,65,共4页Computer Applications and Software

基　　金：国家自然科学基金(编号:69773041)

摘　　要：Ada的会合机制使我们能在高级语言一级上描述系统的并发活动,从而避免了在使用低级通信原语时所不可避免的问题。但由于会合机制是一种完全同步的实现机制,因此其并发效率较低。为此,本文提出:采用基于Ada保护对象的(异步)信箱机制实现Ada会合的服务模型,使之既具有会合机制的高可靠性,又能提高系统的并发度和实现效率。The rendezvous mechanism of Ada provides an advanced high level approach to task synchronization, which avoids the problems encountered by the use of low- level primitives,such as semaphores and signals. However, the rendezvous mechanism is reahzed in completely synchronized way so that its concurrent efficiency is lower than asynchronous message communication.An Ada protected object- based(asynchronous) mailbox mechanism is proposed to realize Ada rendezvous service model, which can improve the concurrent efficiency of Ada program and keep on the rendezvous model's reliability.

关 键 词：ADA语言 并发程序设计 并发效率 软件系统 

分 类 号：TP311.1[自动化与计算机技术—计算机软件与理论] TP312AD[自动化与计算机技术—计算机科学与技术]