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72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/* Copyright (c) 2008, 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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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 Foundation,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
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#include "my_global.h"
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#include "cursor_by_thread_connect_attr.h"
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cursor_by_thread_connect_attr::cursor_by_thread_connect_attr(
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const PFS_engine_table_share *share) :
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PFS_engine_table(share, &m_pos), m_row_exists(false)
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{}
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int cursor_by_thread_connect_attr::rnd_next(void)
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{
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PFS_thread *thread;
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for (m_pos.set_at(&m_next_pos);
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m_pos.has_more_thread();
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m_pos.next_thread())
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{
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thread= &thread_array[m_pos.m_index_1];
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if (thread->m_lock.is_populated())
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{
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make_row(thread, m_pos.m_index_2);
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if (m_row_exists)
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{
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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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}
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return HA_ERR_END_OF_FILE;
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}
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int cursor_by_thread_connect_attr::rnd_pos(const void *pos)
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{
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PFS_thread *thread;
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set_position(pos);
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DBUG_ASSERT(m_pos.m_index_1 < thread_max);
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thread= &thread_array[m_pos.m_index_1];
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if (!thread->m_lock.is_populated())
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return HA_ERR_RECORD_DELETED;
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make_row(thread, m_pos.m_index_2);
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if (m_row_exists)
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return 0;
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return HA_ERR_RECORD_DELETED;
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}
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void cursor_by_thread_connect_attr::reset_position(void)
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{
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m_pos.reset();
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m_next_pos.reset();
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}
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