diff options
Diffstat (limited to 'erts/emulator/beam/erl_alloc_util.h')
| -rw-r--r-- | erts/emulator/beam/erl_alloc_util.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_alloc_util.h b/erts/emulator/beam/erl_alloc_util.h index 4773598561..404ba66971 100644 --- a/erts/emulator/beam/erl_alloc_util.h +++ b/erts/emulator/beam/erl_alloc_util.h @@ -221,8 +221,15 @@ erts_aint32_t erts_alcu_fix_alloc_shrink(Allctr_t *, erts_aint32_t); #define MBC_FBLK_SZ_MASK UNIT_MASK #define CARRIER_SZ_MASK UNIT_MASK - #if HAVE_ERTS_MSEG + +# define MSEG_UNIT_SHIFT MSEG_ALIGN_BITS +# define MSEG_UNIT_SZ (1 << MSEG_UNIT_SHIFT) +# define MSEG_UNIT_MASK ((~(UWord)0) << MSEG_UNIT_SHIFT) + +# define MSEG_UNIT_FLOOR(X) ((X) & MSEG_UNIT_MASK) +# define MSEG_UNIT_CEILING(X) MSEG_UNIT_FLOOR((X) + ~MSEG_UNIT_MASK) + # ifdef ARCH_64 # define MBC_ABLK_OFFSET_BITS 24 # elif HAVE_SUPER_ALIGNED_MB_CARRIERS @@ -280,6 +287,30 @@ typedef struct { #endif } Block_t; +#define THIS_FREE_BLK_HDR_FLG (((UWord) 1) << 0) +#define PREV_FREE_BLK_HDR_FLG (((UWord) 1) << 1) +#define LAST_BLK_HDR_FLG (((UWord) 1) << 2) + +#define SBC_BLK_HDR_FLG /* Special flag combo for (allocated) SBC blocks */\ + (THIS_FREE_BLK_HDR_FLG | PREV_FREE_BLK_HDR_FLG | LAST_BLK_HDR_FLG) + +#define IS_SBC_BLK(B) (((B)->bhdr & FLG_MASK) == SBC_BLK_HDR_FLG) +#define IS_MBC_BLK(B) (!IS_SBC_BLK((B))) +#define IS_FREE_BLK(B) (ASSERT(IS_MBC_BLK(B)), \ + (B)->bhdr & THIS_FREE_BLK_HDR_FLG) + +#if MBC_ABLK_OFFSET_BITS +# define FBLK_TO_MBC(B) (ASSERT(IS_MBC_BLK(B) && IS_FREE_BLK(B)), \ + (B)->u.carrier) +# define ABLK_TO_MBC(B) \ + (ASSERT(IS_MBC_BLK(B) && !IS_FREE_BLK(B)), \ + (Carrier_t*)((MSEG_UNIT_FLOOR((UWord)(B)) - \ + (((B)->bhdr >> MBC_ABLK_OFFSET_SHIFT) << MSEG_UNIT_SHIFT)))) +#else +# define FBLK_TO_MBC(B) ((B)->carrier) +# define ABLK_TO_MBC(B) ((B)->carrier) +#endif + typedef UWord FreeBlkFtr_t; /* Footer of a free block */ typedef struct { |