queue and pipe的区别

[xiaofk]

在任务间的通信中，队列和管道具体的用法和用途有什么区别吗？还有 管道提供了与队列互换的功能是什么意思？

[mike_jiang_feng]

Actually it is based upon your useage and OS system.
In vxworks,
"message queue" is the primary intertask communication mechanism. It is FIFO order. Any task and interrupt can send a message to a queue. Please note that full duplex communication between two tasks need two message queues.
"pipe" is a mechanism to let tasks to communicate with each other through the standard I/O interface. It can be read/write... For general meaning, pipe has more overhead than message queue because it use I/O lib. But pipe can allow a task to wait for data to be available on any of a set of I/O devices. So using pipe, a task can wait for data on a combination of several pipes, sockets and serial devices.
Message has more flexible options for timeouts and message priorities. Pipe can fit your complex need.

------Not very sure whether it can fit your want. And is there anyone knows about these two useage in other Embed-OS?

[mike_jiang_feng]

In vxworks, it seems it can not be realized that exchanging between pipe and queue. Still, from useage, they have many thing alike.

[xiaofk]

没有人知道吗？

[liaojidong]

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[xiaofk]

thanks!