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Diffstat (limited to '')
| -rw-r--r-- | storage/innobase/include/btr0sea.inl | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/storage/innobase/include/btr0sea.inl b/storage/innobase/include/btr0sea.inl new file mode 100644 index 00000000..5a8d6480 --- /dev/null +++ b/storage/innobase/include/btr0sea.inl @@ -0,0 +1,117 @@ +/***************************************************************************** + +Copyright (c) 1996, 2015, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 2018, 2021, MariaDB Corporation. + +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 +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +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 Street, Fifth Floor, Boston, MA 02110-1335 USA + +*****************************************************************************/ + +/********************************************************************//** +@file include/btr0sea.ic +The index tree adaptive search + +Created 2/17/1996 Heikki Tuuri +*************************************************************************/ + +#include "dict0mem.h" +#include "btr0cur.h" +#include "buf0buf.h" + +/** Create and initialize search info. +@param[in,out] heap heap where created +@return own: search info struct */ +static inline btr_search_t* btr_search_info_create(mem_heap_t* heap) +{ + btr_search_t* info = static_cast<btr_search_t*>( + mem_heap_zalloc(heap, sizeof(btr_search_t))); + ut_d(info->magic_n = BTR_SEARCH_MAGIC_N); +#ifdef BTR_CUR_HASH_ADAPT + info->n_fields = 1; + info->left_side = TRUE; +#endif /* BTR_CUR_HASH_ADAPT */ + return(info); +} + +#ifdef BTR_CUR_HASH_ADAPT +/** Updates the search info. +@param[in,out] info search info +@param[in,out] cursor cursor which was just positioned */ +void btr_search_info_update_slow(btr_search_t *info, btr_cur_t *cursor); + +/*********************************************************************//** +Updates the search info. */ +static inline +void +btr_search_info_update( +/*===================*/ + dict_index_t* index, /*!< in: index of the cursor */ + btr_cur_t* cursor) /*!< in: cursor which was just positioned */ +{ + ut_ad(!index->is_spatial()); + ut_ad(!index->table->is_temporary()); + + if (!btr_search_enabled) { + return; + } + + btr_search_t* info; + info = btr_search_get_info(index); + + info->hash_analysis++; + + if (info->hash_analysis < BTR_SEARCH_HASH_ANALYSIS) { + + /* Do nothing */ + + return; + + } + + ut_ad(cursor->flag != BTR_CUR_HASH); + + btr_search_info_update_slow(info, cursor); +} + +/** Lock all search latches in exclusive mode. */ +static inline void btr_search_x_lock_all() +{ + for (ulint i = 0; i < btr_ahi_parts; ++i) { + btr_search_sys.parts[i].latch.wr_lock(SRW_LOCK_CALL); + } +} + +/** Unlock all search latches from exclusive mode. */ +static inline void btr_search_x_unlock_all() +{ + for (ulint i = 0; i < btr_ahi_parts; ++i) { + btr_search_sys.parts[i].latch.wr_unlock(); + } +} + +/** Lock all search latches in shared mode. */ +static inline void btr_search_s_lock_all() +{ + for (ulint i = 0; i < btr_ahi_parts; ++i) { + btr_search_sys.parts[i].latch.rd_lock(SRW_LOCK_CALL); + } +} + +/** Unlock all search latches from shared mode. */ +static inline void btr_search_s_unlock_all() +{ + for (ulint i = 0; i < btr_ahi_parts; ++i) { + btr_search_sys.parts[i].latch.rd_unlock(); + } +} +#endif /* BTR_CUR_HASH_ADAPT */ |