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bus: Add a new IVAR accessor to check for the existence of an IVAR
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Authored by jhb on Wed, Feb 18, 3:48 PM.
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imp
Summary

<varp>_has_<var> returns true if the given IVAR can be read.

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rG FreeBSD src repository
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Buildable 70755
Build 67638: arc lint + arc unit

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jhb requested review of this revision.Wed, Feb 18, 3:48 PM
jhb created this revision.

Might want to note this determines this by reading the value.... though maybe not: all ivars are supposed to be O(1) to compute.

This revision is now accepted and ready to land.Wed, Feb 18, 4:23 PM