Shared Memory and Shared Variables

Mutex variable

Shared memory and shared variables are huge topics in concurrent programming and the most common ways for UNIX threads to communicate with each other. The same principles apply to Go and goroutines, which is what this lesson is about. A mutex variable, which is an abbreviation of mutual exclusion variable, is mainly used for thread synchronization and for protecting shared data when multiple writes can occur at the same time. A mutex works like a buffered channel with a capacity of one, which allows, at most, one goroutine to access a shared variable at any given time. This means that there is no way for two or more goroutines to be ...