diff options
Diffstat (limited to 'storage/xtradb/include/row0vers.h')
| -rw-r--r-- | storage/xtradb/include/row0vers.h | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/storage/xtradb/include/row0vers.h b/storage/xtradb/include/row0vers.h index 48d5fc43fd1..1df5b4d3e98 100644 --- a/storage/xtradb/include/row0vers.h +++ b/storage/xtradb/include/row0vers.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1997, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1997, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., -51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -37,13 +37,15 @@ Created 2/6/1997 Heikki Tuuri /*****************************************************************//** Finds out if an active transaction has inserted or modified a secondary -index record. NOTE: the kernel mutex is temporarily released in this -function! -@return NULL if committed, else the active transaction */ +index record. +@return 0 if committed, else the active transaction id; +NOTE that this function can return false positives but never false +negatives. The caller must confirm all positive results by calling +trx_is_active() while holding lock_sys->mutex. */ UNIV_INTERN -trx_t* -row_vers_impl_x_locked_off_kernel( -/*==============================*/ +trx_id_t +row_vers_impl_x_locked( +/*===================*/ const rec_t* rec, /*!< in: record in a secondary index */ dict_index_t* index, /*!< in: the secondary index */ const ulint* offsets);/*!< in: rec_get_offsets(rec, index) */ @@ -85,7 +87,7 @@ read should see. We assume that the trx id stored in rec is such that the consistent read should not see rec in its present version. @return DB_SUCCESS or DB_MISSING_HISTORY */ UNIV_INTERN -ulint +dberr_t row_vers_build_for_consistent_read( /*===============================*/ const rec_t* rec, /*!< in: record in a clustered index; the @@ -104,16 +106,17 @@ row_vers_build_for_consistent_read( *old_vers is allocated; memory for possible intermediate versions is allocated and freed locally within the function */ - rec_t** old_vers);/*!< out, own: old version, or NULL if the - record does not exist in the view, that is, + rec_t** old_vers)/*!< out, own: old version, or NULL + if the history is missing or the record + does not exist in the view, that is, it was freshly inserted afterwards */ + __attribute__((nonnull(1,2,3,4,5,6,7))); /*****************************************************************//** Constructs the last committed version of a clustered index record, -which should be seen by a semi-consistent read. -@return DB_SUCCESS or DB_MISSING_HISTORY */ +which should be seen by a semi-consistent read. */ UNIV_INTERN -ulint +void row_vers_build_for_semi_consistent_read( /*====================================*/ const rec_t* rec, /*!< in: record in a clustered index; the @@ -130,9 +133,10 @@ row_vers_build_for_semi_consistent_read( *old_vers is allocated; memory for possible intermediate versions is allocated and freed locally within the function */ - const rec_t** old_vers);/*!< out: rec, old version, or NULL if the + const rec_t** old_vers)/*!< out: rec, old version, or NULL if the record does not exist in the view, that is, it was freshly inserted afterwards */ + __attribute__((nonnull(1,2,3,4,5))); #ifndef UNIV_NONINL |