61 lines
2.0 KiB
C++
61 lines
2.0 KiB
C++
/* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/*
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Lock databases against read or write.
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*/
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#include <fcntl.h>
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#include "storage/myisammrg/myrg_def.h"
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#ifdef _WIN32
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#include "storage/myisam/myisamdef.h"
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#endif
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int myrg_lock_database(MYRG_INFO *info, int lock_type) {
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int error, new_error;
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MYRG_TABLE *file;
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error = 0;
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for (file = info->open_tables; file != info->end_table; file++) {
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#ifdef _WIN32
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/*
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Make sure this table is marked as owned by a merge table.
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The semaphore is never released as long as table remains
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in memory. This should be refactored into a more generic
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approach (observer pattern)
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*/
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(file->table)->owned_by_merge = true;
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#endif
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if ((new_error = mi_lock_database(file->table, lock_type))) {
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error = new_error;
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if (lock_type != F_UNLCK) {
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while (--file >= info->open_tables)
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mi_lock_database(file->table, F_UNLCK);
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break;
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}
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}
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}
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return (error);
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}
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