diff options
Diffstat (limited to 'storage/xtradb/include/data0data.ic')
| -rw-r--r-- | storage/xtradb/include/data0data.ic | 53 |
1 files changed, 42 insertions, 11 deletions
diff --git a/storage/xtradb/include/data0data.ic b/storage/xtradb/include/data0data.ic index 5c0f8039c80..205fa397987 100644 --- a/storage/xtradb/include/data0data.ic +++ b/storage/xtradb/include/data0data.ic @@ -348,23 +348,25 @@ dtuple_get_nth_field( #endif /* UNIV_DEBUG */ /**********************************************************//** -Creates a data tuple to a memory heap. The default value for number -of fields used in record comparisons for this tuple is n_fields. -@return own: created tuple */ +Creates a data tuple from an already allocated chunk of memory. +The size of the chunk must be at least DTUPLE_EST_ALLOC(n_fields). +The default value for number of fields used in record comparisons +for this tuple is n_fields. +@return created tuple (inside buf) */ UNIV_INLINE dtuple_t* -dtuple_create( -/*==========*/ - mem_heap_t* heap, /*!< in: memory heap where the tuple - is created */ - ulint n_fields) /*!< in: number of fields */ +dtuple_create_from_mem( +/*===================*/ + void* buf, /*!< in, out: buffer to use */ + ulint buf_size, /*!< in: buffer size */ + ulint n_fields) /*!< in: number of fields */ { dtuple_t* tuple; - ut_ad(heap); + ut_ad(buf != NULL); + ut_a(buf_size >= DTUPLE_EST_ALLOC(n_fields)); - tuple = (dtuple_t*) mem_heap_alloc(heap, sizeof(dtuple_t) - + n_fields * sizeof(dfield_t)); + tuple = (dtuple_t*) buf; tuple->info_bits = 0; tuple->n_fields = n_fields; tuple->n_fields_cmp = n_fields; @@ -386,9 +388,38 @@ dtuple_create( dfield_get_type(field)->mtype = DATA_ERROR; } } +#endif + return(tuple); +} + +/**********************************************************//** +Creates a data tuple to a memory heap. The default value for number +of fields used in record comparisons for this tuple is n_fields. +@return own: created tuple */ +UNIV_INLINE +dtuple_t* +dtuple_create( +/*==========*/ + mem_heap_t* heap, /*!< in: memory heap where the tuple + is created, DTUPLE_EST_ALLOC(n_fields) + bytes will be allocated from this heap */ + ulint n_fields) /*!< in: number of fields */ +{ + void* buf; + ulint buf_size; + dtuple_t* tuple; + + ut_ad(heap); + + buf_size = DTUPLE_EST_ALLOC(n_fields); + buf = mem_heap_alloc(heap, buf_size); + tuple = dtuple_create_from_mem(buf, buf_size, n_fields); + +#ifdef UNIV_DEBUG UNIV_MEM_INVALID(tuple->fields, n_fields * sizeof *tuple->fields); #endif + return(tuple); } |