/vm/gc_info.hpp
http://github.com/abeaumont/factor · C++ Header · 67 lines · 54 code · 13 blank · 0 comment · 0 complexity · fe32d5c9ad8fa5f2b77db372bebd5556 MD5 · raw file
- namespace factor
- {
- struct gc_info {
- u32 scrub_d_count;
- u32 scrub_r_count;
- u32 gc_root_count;
- u32 derived_root_count;
- u32 return_address_count;
- cell callsite_bitmap_size()
- {
- return scrub_d_count + scrub_r_count + gc_root_count;
- }
- cell total_bitmap_size()
- {
- return return_address_count * callsite_bitmap_size();
- }
- cell total_bitmap_bytes()
- {
- return ((total_bitmap_size() + 7) / 8);
- }
- u32 *return_addresses()
- {
- return (u32 *)this - return_address_count;
- }
- u32 *base_pointer_map()
- {
- return return_addresses() - return_address_count * derived_root_count;
- }
- u8 *gc_info_bitmap()
- {
- return (u8 *)base_pointer_map() - total_bitmap_bytes();
- }
- cell callsite_scrub_d(cell index)
- {
- return index * scrub_d_count;
- }
- cell callsite_scrub_r(cell index)
- {
- return return_address_count * scrub_d_count +
- index * scrub_r_count;
- }
- cell callsite_gc_roots(cell index)
- {
- return return_address_count * scrub_d_count
- + return_address_count * scrub_r_count
- + index * gc_root_count;
- }
- u32 lookup_base_pointer(cell index, cell derived_root)
- {
- return base_pointer_map()[index * derived_root_count + derived_root];
- }
- cell return_address_index(cell return_address);
- };
- }