GC maps for more compact inline GC checks

[factor.git] / vm / layouts.hpp

diff --git a/vm/layouts.hpp b/vm/layouts.hpp
index 5e7ca0279f73582e1476c895ff4e8dc4939169c7..b0edb4be164d7691e6446cf80334859af555fcfc 100644 (file)
--- a/vm/layouts.hpp
+++ b/vm/layouts.hpp
@@ -23,6 +23,11 @@ inline static cell align(cell a, cell b)
        return (a + (b-1)) & ~(b-1);
 }
 
+inline static cell alignment_for(cell a, cell b)
+{
+       return align(a,b) - a;
+}
+
 static const cell data_alignment = 16;
 
 #define WORD_SIZE (signed)(sizeof(cell)*8)
@@ -98,7 +103,10 @@ struct object {
        cell header;
 
        cell size() const;
+       template<typename Fixup> cell size(Fixup fixup) const;
+
        cell binary_payload_start() const;
+       template<typename Fixup> cell binary_payload_start(Fixup fixup) const;
 
        cell *slots() const { return (cell *)this; }