Raspberry Pi for Arduino Users: Building IoT and Network Applications and Devices

© James R. Strickland 2018

James R. StricklandRaspberry Pi for Arduino Usershttps://doi.org/10.1007/978-1-4842-3414-3_8

8. One Process, Multiple Threads

James R. Strickland¹ 

(1)

Highlands Ranch, Colorado, USA

 

The ability to add processes, especially to load different applications in them (which you can with commands we didn’t talk about last chapter), is a useful capability. But there are some downsides. Getting one process to communicate with another, for example, involves an outside mechanism. You can write to a file and have the second process read that file in, so long as you have some kind of file locking in place, so reads and writes don’t happen at the same time. You can use a standard UNIX/Linux tool called a pipe, which looks like a file ...