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perfschema 5.6.10 initial commit.

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Sergei Golubchik
2014-05-06 23:20:50 +02:00
commit d74414399d
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storage/perfschema/cursor_by_thread.cc Normal file
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/* Copyright (c) 2011, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/**
@file storage/perfschema/cursor_by_thread.cc
Cursor CURSOR_BY_THREAD (implementation).
*/
#include "my_global.h"
#include "cursor_by_thread.h"
#include "pfs_instr.h"
cursor_by_thread::cursor_by_thread(const PFS_engine_table_share *share)
: PFS_engine_table(share, &m_pos),
m_pos(0), m_next_pos(0)
{}
void cursor_by_thread::reset_position(void)
{
m_pos.m_index= 0;
m_next_pos.m_index= 0;
}
int cursor_by_thread::rnd_next(void)
{
PFS_thread *pfs;
for (m_pos.set_at(&m_next_pos);
m_pos.m_index < thread_max;
m_pos.next())
{
pfs= &thread_array[m_pos.m_index];
if (pfs->m_lock.is_populated())
{
make_row(pfs);
m_next_pos.set_after(&m_pos);
return 0;
}
}
return HA_ERR_END_OF_FILE;
}
int
cursor_by_thread::rnd_pos(const void *pos)
{
PFS_thread *pfs;
set_position(pos);
DBUG_ASSERT(m_pos.m_index < thread_max);
pfs= &thread_array[m_pos.m_index];
if (pfs->m_lock.is_populated())
{
make_row(pfs);
return 0;
}
return HA_ERR_RECORD_DELETED;
}