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For C-based implementations of ruby 1.8 and ruby 1.9, is File#print atomic when it is given multiple arguments?

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Examining it empirically, the answer's no.

10.times do Thread.new do print "foo", "\n" end end

gives (in ruby 1.8.7 (2008-08-11 patchlevel 72) [universal-darwin10.0])

foofoofoo foo foo foo foo foo foo foo

Don't know where you can look up what is atomic and what isn't atomic, though.

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