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79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/* Copyright (c) 2011, 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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
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/**
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@file storage/perfschema/cursor_by_user.cc
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Cursor CURSOR_BY_USER (implementation).
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*/
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#include "my_global.h"
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#include "cursor_by_user.h"
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#include "pfs_user.h"
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cursor_by_user::cursor_by_user(const PFS_engine_table_share *share)
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: PFS_engine_table(share, &m_pos),
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m_pos(0), m_next_pos(0)
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{}
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void cursor_by_user::reset_position(void)
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{
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m_pos.m_index= 0;
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m_next_pos.m_index= 0;
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}
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int cursor_by_user::rnd_next(void)
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{
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PFS_user *pfs;
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for (m_pos.set_at(&m_next_pos);
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m_pos.m_index < user_max;
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m_pos.next())
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{
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pfs= &user_array[m_pos.m_index];
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if (pfs->m_lock.is_populated())
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{
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make_row(pfs);
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m_next_pos.set_after(&m_pos);
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return 0;
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}
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}
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return HA_ERR_END_OF_FILE;
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}
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int
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cursor_by_user::rnd_pos(const void *pos)
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{
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PFS_user *pfs;
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set_position(pos);
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DBUG_ASSERT(m_pos.m_index < user_max);
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pfs= &user_array[m_pos.m_index];
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if (pfs->m_lock.is_populated())
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{
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make_row(pfs);
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return 0;
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}
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return HA_ERR_RECORD_DELETED;
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}
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