summaryrefslogtreecommitdiff
path: root/storage/innobase/include/sync0arr.ic
diff options
context:
space:
mode:
Diffstat (limited to 'storage/innobase/include/sync0arr.ic')
-rw-r--r--storage/innobase/include/sync0arr.ic64
1 files changed, 64 insertions, 0 deletions
diff --git a/storage/innobase/include/sync0arr.ic b/storage/innobase/include/sync0arr.ic
new file mode 100644
index 00000000000..18a46dd0a41
--- /dev/null
+++ b/storage/innobase/include/sync0arr.ic
@@ -0,0 +1,64 @@
+/*****************************************************************************
+
+Copyright (c) 1995, 2013, 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
+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, Suite 500, Boston, MA 02110-1335 USA
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/sync0arr.ic
+The wait array for synchronization primitives
+
+Inline code
+
+Created 9/5/1995 Heikki Tuuri
+*******************************************************/
+
+/** User configured sync array size */
+extern ulong srv_sync_array_size;
+
+/******************************************************************//**
+Get an instance of the sync wait array and reserve a wait array cell
+in the instance for waiting for an object. The event of the cell is
+reset to nonsignalled state.
+If reserving cell of the instance fails, try to get another new
+instance until we can reserve an empty cell of it.
+@return the instance found, never NULL. */
+UNIV_INLINE
+sync_array_t*
+sync_array_get_and_reserve_cell(
+/*============================*/
+ void* object, /*!< in: pointer to the object to wait for */
+ ulint type, /*!< in: lock request type */
+ const char* file, /*!< in: file where requested */
+ ulint line, /*!< in: line where requested */
+ ulint* index) /*!< out: index of the reserved cell */
+{
+ sync_array_t* sync_arr;
+ bool reserved = false;
+
+ for (ulint i = 0; i < srv_sync_array_size && !reserved; ++i) {
+ sync_arr = sync_array_get();
+ reserved = sync_array_reserve_cell(sync_arr, object, type,
+ file, line, index);
+ }
+
+ /* This won't be true every time, for the loop above may execute
+ more than srv_sync_array_size times to reserve a cell.
+ But an assertion here makes the code more solid. */
+ ut_a(reserved);
+
+ return sync_arr;
+}
+