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/*------------------------------------------------------------------------- * * visibilitymap.h * visibility map interface * * * Portions Copyright (c) 2007-2016, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/access/visibilitymap.h * *------------------------------------------------------------------------- */ #ifndef VISIBILITYMAP_H #define VISIBILITYMAP_H #include "access/xlogdefs.h" #include "storage/block.h" #include "storage/buf.h" #include "utils/relcache.h" /* Number of bits for one heap page */ #define BITS_PER_HEAPBLOCK 2 /* Flags for bit map */ #define VISIBILITYMAP_ALL_VISIBLE 0x01 #define VISIBILITYMAP_ALL_FROZEN 0x02 #define VISIBILITYMAP_VALID_BITS 0x03 /* OR of all valid * visibilitymap 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 bool visibilitymap_clear(Relation rel, BlockNumber heapBlk, Buffer vmbuf, uint8 flags); 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, 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 */