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- #ifndef _gc_
- #define _gc_
-
-
- #include "mlvalues.h"
-
- /* Defined in [major_gc.c]. */
- extern unsigned free_mem_percent_min, free_mem_percent_max;
-
- #define White (0 << 8)
- #define Gray (1 << 8)
- #define Blue (2 << 8)
- #define Black (3 << 8)
-
- #define Color_hd(hd) ((color_t) ((hd) & Black))
- #define Color_hp(hp) Color_hd (Hd_hp (hp))
-
- #define Is_white_hd(hd) (Color_hd (hd) == White)
- #define Is_gray_hd(hd) (Color_hd (hd) == Gray)
- #define Is_blue_hd(hd) (Color_hd (hd) == Blue)
- #define Is_black_hd(hd) (Color_hd (hd) == Black)
-
- #define Whitehd_hd(hd) ((hd) & ~Black)
- #define Grayhd_hd(hd) (((hd) & ~Black) | Gray)
- #define Blackhd_hd(hd) ((hd) | Black)
- #define Bluehd_hd(hd) (((hd) & ~Black) | Blue)
-
- /* This depends on the layout of the header. See [mlvalues.h]. */
- #define Make_header(wosize, tag, color) \
- ((header_t) (((header_t) (wosize) << 10) \
- + (color) \
- + (tag_t) (tag)))
-
- #define Color_val(val) (Color_hd (Hd_val (val)))
-
- #define Is_white_val(val) (Color_val(val) == White)
- #define Is_gray_val(val) (Color_val(val) == Gray)
- #define Is_blue_val(val) (Color_val(val) == Blue)
- #define Is_black_val(val) (Color_val(val) == Black)
-
-
- #endif /* _gc_ */
-