mutex.md

Mutex

Warning

This feature was added in build 33.

This little article covers mutual exclusiveness. Two instructions that you use to manage mutex variables are:

• lock and,
• unlock.

.data
    @mutex
    string testinggg: ""
.start
    thread Funnyx -> {
        fetch testinggg
        lock this
        mov &testinggg, "Testing the funny string"
        mov tlr, testinggg
        call std::ios::writeln
        unlock this
    }

    lock &testinggg
    mov &testinggg, "Testing the funny string from main thread"
    mov tlr, testinggg
    call std::ios::writeln
    unlock &testinggg

    await &Funnyx
    mov tlr, &Funnyx
    sysenter "thread"
    mov fdx, 1
    syscall

The mutex attribute allows you to mark variables as mutually exclusive so that only one thread can manipulate with a variable, forcing other variables to wait for an unlock.

Note

After a specific thread ends, you do not have to use unlock to unlock any locked mutexes. The thread will do it for you, however using unlock is a good practice since it boosts your program performance by immediatelly letting other threads use a specific mutex.