RCR 269: Add Thread.atomic

Implementation

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class Thread

  def self.atomic
    old = critical
    critical = true
    begin
      yield
    ensure
      critical = old
    end
  end

end

Comments

Current voting

The implementation has been garbled. So here it is again:

class Thread

  def self.atomic
    old = self.critical
    self.critical = true
    begin
      yield
    ensure
      self.critical = old
    end
  end

end

Guy, thanks for that hint!

-- Robert

I recommend to use Mutex (or Monitor) instead of Thread#critical, which is designed to be an internal kludge to implement mutex etc.

-- matz.

Matz, I couldn't agree more. But apparently there are people who want to use Thread.critical - Thread.atomic could help them to make less errors.

-- Robert

What's wrong with Thread.exclusive { ... } (from thread.rb)?

-- Paul Brannan

Probably that I didn't find it. Documentation seems to be missing:

Thanks for that hint, Paul!

Withdrawing RCR...

-- Robert

Abstract

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