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LINUX下消息队列

于 2022-07-27 发布 文件大小:15.06 kB
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Linux下消息队列 用于进程间通信,有4个例程,可以实现 1.消息队列是消息的链表,具有特定的格式,存放在内存中并由消息队列标识符标识.  2.消息队列允许一个或多个进程向它写入与读取消息.  3.管道和命名管道都是通信数据都是先进先出的原则。  4.消息队列可以实现消息的随机查询,消息不一定要以先进先出的次序读取,也可以按消息的类型读取.比FIFO更有优势。     目前主要有两种类型的消息队列:POSIX消息队列以及系统V消息队列,系统V消息队列目前被大量使用。系统V消息队列是随内核持续的,只有在内核重起或者人工删除时,该消息队列才会被删除

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