diff options
Diffstat (limited to 'src/include/access/visibilitymap.h')
| -rw-r--r-- | src/include/access/visibilitymap.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/src/include/access/visibilitymap.h b/src/include/access/visibilitymap.h index d447daff7a5..b8dc54c55d2 100644 --- a/src/include/access/visibilitymap.h +++ b/src/include/access/visibilitymap.h @@ -19,15 +19,30 @@ #include "storage/buf.h" #include "utils/relcache.h" +#define BITS_PER_HEAPBLOCK 2 +#define HEAPBLOCKS_PER_BYTE (BITS_PER_BYTE / BITS_PER_HEAPBLOCK) + +/* Flags for bit map */ +#define VISIBILITYMAP_ALL_VISIBLE 0x01 +#define VISIBILITYMAP_ALL_FROZEN 0x02 +#define VISIBILITYMAP_VALID_BITS 0x03 /* OR of all valid visiblitymap flags bits */ + +/* Macros for visibilitymap test */ +#define VM_ALL_VISIBLE(r, b, v) \ + ((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_VISIBLE) != 0) +#define VM_ALL_FROZEN(r, b, v) \ + ((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_FROZEN) != 0) + extern void visibilitymap_clear(Relation rel, BlockNumber heapBlk, Buffer vmbuf); extern void visibilitymap_pin(Relation rel, BlockNumber heapBlk, Buffer *vmbuf); extern bool visibilitymap_pin_ok(BlockNumber heapBlk, Buffer vmbuf); extern void visibilitymap_set(Relation rel, BlockNumber heapBlk, Buffer heapBuf, - XLogRecPtr recptr, Buffer vmBuf, TransactionId cutoff_xid); -extern bool visibilitymap_test(Relation rel, BlockNumber heapBlk, Buffer *vmbuf); -extern BlockNumber visibilitymap_count(Relation rel); + XLogRecPtr recptr, Buffer vmBuf, TransactionId cutoff_xid, + uint8 flags); +extern uint8 visibilitymap_get_status(Relation rel, BlockNumber heapBlk, Buffer *vmbuf); +extern void visibilitymap_count(Relation rel, BlockNumber *all_visible, BlockNumber *all_frozen); extern void visibilitymap_truncate(Relation rel, BlockNumber nheapblocks); #endif /* VISIBILITYMAP_H */ |