diff options
Diffstat (limited to 'storage/perfschema/cursor_by_thread.cc')
-rw-r--r-- | storage/perfschema/cursor_by_thread.cc | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/storage/perfschema/cursor_by_thread.cc b/storage/perfschema/cursor_by_thread.cc new file mode 100644 index 00000000000..06ee2f6cbef --- /dev/null +++ b/storage/perfschema/cursor_by_thread.cc @@ -0,0 +1,72 @@ +/* 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; +} + |