msgget()和mq_open之间的区别 [英] difference between msgget() and mq_open

问题描述

我了解有关消息队列操作，例如msgget()，msgsnd()和msgrcv()的信息.但是，当我在堆栈溢出时搜索与消息队列相关的问题时，我才知道还有另一组消息队列操作，例如mq_open()，mq_send()和mq_receive().谁能让我知道这两种类型的消息队列之间有什么区别，以及广泛使用的是哪种类型的消息队列?

I Read about message queue operations such as msgget(), msgsnd() and msgrcv(). But when I was searching for message queue related questions on stack overflow, I came to know there is another set of message queue operations such as mq_open(), mq_send(), mq_receive(). Can any one please let me know what are the differences between these 2 types of message queues and which type of message queues are extensively being used?

推荐答案

基本上，msgget，msgsnd，msgrcv是System V IPC，而mq_open，mq_send，mq_receive是POSIX IPC

Basicly, msgget, msgsnd, msgrcv are System V IPC, while mq_open, mq_send, mq_receive are POSIX IPC.

一个很好的解释:系统V IPC与POSIX IPC

用于System V IPC的Oracle文档

用于POSIX IPC的Oracle文档

总而言之，POSIX IPC是在System V IPC之后设计的.因此，许多旧系统仅支持System V IPC，而新系统也开始支持POSIX IPC.并且，由于POSIX IPC可以从System V IPC中学习优点和缺点，因此可以更好地设计和实现POSIX IPC.一个显着的区别是所有POSIX IPC接口都是线程安全的.

In summary, POSIX IPC is designed after System V IPC. So a lot of old systems support only System V IPC while new systems begin to support POSIX IPC as well. And, because POSIX IPC can learn the advantages and disadvantages from System V IPC, POSIX IPC may be designed and implemented better. A notable difference is that all the POSIX IPC interfaces are thread safe.

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