diff options
Diffstat (limited to 'src/third_party/wiredtiger/src/include/cell.h')
| -rw-r--r-- | src/third_party/wiredtiger/src/include/cell.h | 79 |
1 files changed, 53 insertions, 26 deletions
diff --git a/src/third_party/wiredtiger/src/include/cell.h b/src/third_party/wiredtiger/src/include/cell.h index 760811e5acf..d7a5452dbe1 100644 --- a/src/third_party/wiredtiger/src/include/cell.h +++ b/src/third_party/wiredtiger/src/include/cell.h @@ -144,37 +144,64 @@ struct __wt_cell { uint8_t __chunk[1 + 1 + 1 + 7 * WT_INTPACK64_MAXSIZE + WT_INTPACK32_MAXSIZE]; }; +/* AUTOMATIC FLAG VALUE GENERATION START */ +#define WT_CELL_UNPACK_OVERFLOW 0x1u /* cell is an overflow */ +#define WT_CELL_UNPACK_PREPARE 0x2u /* cell is part of a prepared transaction */ +#define WT_CELL_UNPACK_TIME_WINDOW_CLEARED 0x4u /* time window cleared because of restart */ + /* AUTOMATIC FLAG VALUE GENERATION STOP */ + /* - * WT_CELL_UNPACK -- - * Unpacked cell. + * We have two "unpacked cell" structures: one holding holds unpacked cells from internal nodes + * (address pages), and one holding unpacked cells from leaf nodes (key/value pages). They share a + * common set of initial fields: in a few places where a function has to handle both types of + * unpacked cells, the unpacked cell structures are cast to an "unpack-common" structure that can + * only reference shared fields. */ -struct __wt_cell_unpack { - WT_CELL *cell; /* Cell's disk image address */ +#define WT_CELL_COMMON_FIELDS \ + WT_CELL *cell; /* Cell's disk image address */ \ + \ + uint64_t v; /* RLE count or recno */ \ + \ + /* \ + * The size and __len fields are reasonably type size_t; don't change the type, performance \ + * drops significantly if they're type size_t. \ + */ \ + const void *data; /* Data */ \ + uint32_t size; /* Data size */ \ + \ + uint32_t __len; /* Cell + data length (usually) */ \ + \ + uint8_t prefix; /* Cell prefix length */ \ + \ + uint8_t raw; /* Raw cell type (include "shorts") */ \ + uint8_t type; /* Cell type */ \ + \ + uint8_t flags - WT_TIME_AGGREGATE ta; /* Address validity window */ - WT_TIME_WINDOW tw; /* Value validity window */ - - uint64_t v; /* RLE count or recno */ - - /* - * !!! - * The size and __len fields are reasonably type size_t; don't change - * the type, performance drops significantly if they're type size_t. - */ - const void *data; /* Data */ - uint32_t size; /* Data size */ +/* + * WT_CELL_UNPACK_COMMON -- + * Unpacked address cell, the common fields. + */ +struct __wt_cell_unpack_common { + WT_CELL_COMMON_FIELDS; +}; - uint32_t __len; /* Cell + data length (usually) */ +/* + * WT_CELL_UNPACK_ADDR -- + * Unpacked address cell. + */ +struct __wt_cell_unpack_addr { + WT_CELL_COMMON_FIELDS; - uint8_t prefix; /* Cell prefix length */ + WT_TIME_AGGREGATE ta; /* Address validity window */ +}; - uint8_t raw; /* Raw cell type (include "shorts") */ - uint8_t type; /* Cell type */ +/* + * WT_CELL_UNPACK_KV -- + * Unpacked value cell. + */ +struct __wt_cell_unpack_kv { + WT_CELL_COMMON_FIELDS; -/* AUTOMATIC FLAG VALUE GENERATION START */ -#define WT_CELL_UNPACK_OVERFLOW 0x1u /* cell is an overflow */ -#define WT_CELL_UNPACK_PREPARE 0x2u /* cell is part of a prepared transaction */ -#define WT_CELL_UNPACK_TIME_WINDOW_CLEARED 0x4u /* time window cleared because of restart */ - /* AUTOMATIC FLAG VALUE GENERATION STOP */ - uint8_t flags; + WT_TIME_WINDOW tw; /* Value validity window */ }; |