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16
liblua/lgc.h
16
liblua/lgc.h
@@ -1,5 +1,5 @@
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/*
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** $Id: lgc.h,v 2.56 2012/05/23 15:43:14 roberto Exp $
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** $Id: lgc.h,v 2.58 2012/09/11 12:53:08 roberto Exp $
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** Garbage Collector
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** See Copyright Notice in lua.h
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*/
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@@ -50,14 +50,24 @@
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#define isgenerational(g) ((g)->gckind == KGC_GEN)
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/*
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** macro to tell when main invariant (white objects cannot point to black
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** macros to tell when main invariant (white objects cannot point to black
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** ones) must be kept. During a non-generational collection, the sweep
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** phase may break the invariant, as objects turned white may point to
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** still-black objects. The invariant is restored when sweep ends and
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** all objects are white again. During a generational collection, the
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** invariant must be kept all times.
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*/
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#define keepinvariant(g) (isgenerational(g) || g->gcstate <= GCSatomic)
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#define keepinvariant(g) (isgenerational(g) || g->gcstate <= GCSatomic)
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/*
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** Outside the collector, the state in generational mode is kept in
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** 'propagate', so 'keepinvariant' is always true.
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*/
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#define keepinvariantout(g) \
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check_exp(g->gcstate == GCSpropagate || !isgenerational(g), \
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g->gcstate <= GCSatomic)
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/*
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