Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 160 insertions, 0 deletions

diff --git a/storage/innobase/include/btr0sea.ic b/storage/innobase/include/btr0sea.ic
new file mode 100644
index 00000000..40eb5d86
--- /dev/null
+++ b/storage/innobase/include/btr0sea.ic
@@ -0,0 +1,160 @@
+/*****************************************************************************
+
+Copyright (c) 1996, 2015, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 2018, 2020, 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(!btr_search_own_any(RW_LOCK_S));
+	ut_ad(!btr_search_own_any(RW_LOCK_X));
+
+	if (dict_index_is_spatial(index) || !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) {
+		rw_lock_x_lock(&btr_search_sys.parts[i].latch);
+	}
+}
+
+/** Unlock all search latches from exclusive mode. */
+static inline void btr_search_x_unlock_all()
+{
+	for (ulint i = 0; i < btr_ahi_parts; ++i) {
+		rw_lock_x_unlock(&btr_search_sys.parts[i].latch);
+	}
+}
+
+/** Lock all search latches in shared mode. */
+static inline void btr_search_s_lock_all()
+{
+	for (ulint i = 0; i < btr_ahi_parts; ++i) {
+		rw_lock_s_lock(&btr_search_sys.parts[i].latch);
+	}
+}
+
+/** Unlock all search latches from shared mode. */
+static inline void btr_search_s_unlock_all()
+{
+	for (ulint i = 0; i < btr_ahi_parts; ++i) {
+		rw_lock_s_unlock(&btr_search_sys.parts[i].latch);
+	}
+}
+
+#ifdef UNIV_DEBUG
+/** Check if thread owns all the search latches.
+@param[in]	mode	lock mode check
+@retval true if owns all of them
+@retval false if does not own some of them */
+static inline bool btr_search_own_all(ulint mode)
+{
+	for (ulint i = 0; i < btr_ahi_parts; ++i) {
+		if (!rw_lock_own(&btr_search_sys.parts[i].latch, mode)) {
+			return(false);
+		}
+	}
+	return(true);
+}
+
+/** Check if thread owns any of the search latches.
+@param[in]	mode	lock mode check
+@retval true if owns any of them
+@retval false if owns no search latch */
+static inline bool btr_search_own_any(ulint mode)
+{
+	for (ulint i = 0; i < btr_ahi_parts; ++i) {
+		if (rw_lock_own(&btr_search_sys.parts[i].latch, mode)) {
+			return(true);
+		}
+	}
+	return(false);
+}
+
+/** @return whether this thread holds any of the search latches */
+static inline bool btr_search_own_any()
+{
+	for (ulint i = btr_ahi_parts; i--; ) {
+		if (rw_lock_own_flagged(&btr_search_sys.parts[i].latch,
+					RW_LOCK_FLAG_X | RW_LOCK_FLAG_S)) {
+			return true;
+		}
+	}
+	return false;
+}
+#endif /* UNIV_DEBUG */
+#endif /* BTR_CUR_HASH_ADAPT */