What is the use of pipes in vxworks

Editor to share with you what is the use of the vxworks pipeline, I hope you will gain something after reading this article, let's discuss it together!

Many OS provide a process communication mechanism: pipes. VxWorks also provides a pipeline-Pipe, and can be used for inter-task communication

As mentioned earlier, multitasking communication mechanisms can be divided into two categories: event notification and data transfer. The main means of data transmission is message queue. And this pipeline encapsulates another layer on top of the message queue to provide services in the form of IO devices.

Practice in Shell

In addition to these basic functions, the pipeline also supports Select operations

And you can adjust the O_NONBLOCK through fcntl () of POSIX

What's the difference between a pipeline and a message queue?

Message queue

You can specify a timeout when sending and receiving

Messages have two priorities

Provided by the kernel, it is more efficient

You can view it directly by using the show () command

Pipeline

Based on message queue encapsulation, slightly less efficient

You can operate using basic IO.

Can be used for IO redirection-ioTaskStdSet ()

Can be used for select ()

After reading this article, I believe you have a certain understanding of "what is the use of pipes in vxworks". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!