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Fix incorrect comment in lgc.h

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The comment gave an incorrect (reversed) version of the invariant, which
could be confusing for people who haven't read the full description in
lgc.cpp.
This commit is contained in:
Arseny Kapoulkine 2024-06-07 09:36:29 -07:00
parent 8a64cb8b73
commit 2c3fac891d
1 changed files with 4 additions and 5 deletions
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9
VM/src/lgc.h
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@ -23,11 +23,10 @@
#define GCSsweep 4
/*
** macro to tell when main invariant (white objects cannot point to black
** ones) must be kept. During a collection, the sweep
** phase may break the invariant, as objects turned white may point to
** still-black objects. The invariant is restored when sweep ends and
** all objects are white again.
** The main invariant of the garbage collector, while marking objects,
** is that a black object can never point to a white one. This invariant
** is not being enforced during a sweep phase, and is restored when sweep
** ends.
*/
#define keepinvariant(g) ((g)->gcstate == GCSpropagate || (g)->gcstate == GCSpropagateagain || (g)->gcstate == GCSatomic)