Fix documentation for @cmpxchg* functions.
#22306
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The text was incorrectly saying that it returns null in the failure path.
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Oops, my bad, I should have searched for it. (I expected that such a small fix would have been merged within days, not 5 months) Well, now that it is here, I will leave this PR open as a reminder to the maintainers to please merge a fix for this issue before more people stumble over this. With now 3 options to choose from, there should be no reason to delay this any further. |
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The text was incorrectly saying that it returns
nullin the failure path, if expected != current, but according to the example code below and my intuition it only returns null when the comparison succeeds.I also decided to simplify the sentence a bit, since the previous sentence structure didn't do a good job at conveying the important piece of information.