How Do You Do File Locking in Raku?

user_4651077 0
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I've been trying to figure out how to do file locking in Raku without success. I started looking into fcntl with NativeCall, but then realized that fcntl locks don't prevent file access from other threads. What's the best way to do file locking in Raku?

raku locking file
2 Answers

IO::Handle has a lock and an unlock method to lock/unlock files. Locks can be exclusive or shared.

user_96717800

I've come across these Raku-idiomatic phrases and use them a lot, with 'given' topicalizing for brevity/clarity:

Read:

    given $path.IO.open {
        .lock: :shared;
        %data = from-json(.slurp);
        .close;
    }

Write:

    given $path.IO.open(:w) {
        .lock;
        .spurt: to-json(%data);
        .close;
    }
user_120637410
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