68 lines
1.2 KiB
C++
68 lines
1.2 KiB
C++
namespace factor
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{
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struct gc_info {
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u32 scrub_d_count;
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u32 scrub_r_count;
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u32 gc_root_count;
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u32 derived_root_count;
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u32 return_address_count;
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cell callsite_bitmap_size()
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{
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return scrub_d_count + scrub_r_count + gc_root_count;
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}
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cell total_bitmap_size()
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{
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return return_address_count * callsite_bitmap_size();
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}
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cell total_bitmap_bytes()
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{
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return ((total_bitmap_size() + 7) / 8);
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}
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u32 *return_addresses()
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{
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return (u32 *)this - return_address_count;
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}
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u32 *base_pointer_map()
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{
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return return_addresses() - return_address_count * derived_root_count;
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}
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u8 *gc_info_bitmap()
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{
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return (u8 *)base_pointer_map() - total_bitmap_bytes();
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}
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cell callsite_scrub_d(cell index)
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{
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return index * scrub_d_count;
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}
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cell callsite_scrub_r(cell index)
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{
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return return_address_count * scrub_d_count +
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index * scrub_r_count;
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}
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cell callsite_gc_roots(cell index)
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{
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return return_address_count * scrub_d_count
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+ return_address_count * scrub_r_count
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+ index * gc_root_count;
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}
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u32 lookup_base_pointer(cell index, cell derived_root)
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{
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return base_pointer_map()[index * derived_root_count + derived_root];
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}
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cell return_address_index(cell return_address);
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};
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}
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