40 lines
933 B
C++
40 lines
933 B
C++
namespace factor
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{
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static const cell card_starts_inside_object = 0xff;
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struct old_space : zone {
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card *object_start_offsets;
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card *object_start_offsets_end;
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old_space(cell size_, cell start_);
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~old_space();
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cell object_start_map_index(cell address)
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{
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return (address - start) >> card_bits;
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}
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/* Find the first object starting on or after the given address */
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cell first_object_in_card(cell address)
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{
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return object_start_offsets[object_start_map_index(address)];
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}
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/* Find the card which contains the header of the object which contains
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the given address */
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cell find_object_start_card(cell address)
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{
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cell i = object_start_map_index(address);
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while(i >= 0 && object_start_offsets[i] == card_starts_inside_object) i--;
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return i;
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}
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void record_object_start_offset(object *obj);
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object *allot(cell size);
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void clear_object_start_offsets();
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cell next_object_after(factor_vm *myvm, cell scan);
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};
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}
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