N工序拥有可以保留下来的M族资源单位,但有时只能发放。 每个进程的最大需求不超过M,所有最大需求总额低于M+N。 能否在系统中出现僵局?
httpsemaphores 。
关于您的最后一个问题: YES。 你们“应该”总是会陷入僵局;如果你看不出如何,请年轻人/乐意/积极发展者。
一种良好的办法,就是有条块分割/循环资源规则。 例如,如果一个进程需要M资源来执行任务,他就可以将其中一半人关在一边,然后等待另一半人能够做任何事情。
我假定,他永远不会放弃,直到他拥有宝贵的资源,一旦完成这项任务,就会释放他们。
单一程序不会造成很多问题,但有几个问题会引发,因为它们将锁定超过M总资源,而且需要更多的资源来摆脱这一冻结状态。
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