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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
*
* Mostly constants and enums used by mysys
*/
#ifndef MYSYS_DEFINITIONS_H
#define MYSYS_DEFINITIONS_H
enum thr_lock_type { TL_IGNORE=-1,
/* UNLOCK ANY LOCK */
TL_UNLOCK,
/* Read lock */
TL_READ,
TL_READ_WITH_SHARED_LOCKS,
/* READ, Don't allow concurrent insert */
TL_READ_NO_INSERT,
/*
Write lock, but allow other threads to read / write.
Used by BDB tables in MySQL to mark that someone is
reading/writing to the table.
*/
TL_WRITE_ALLOW_WRITE,
/*
Write lock, but allow other threads to read.
Used by ALTER TABLE in MySQL to allow readers
to use the table until ALTER TABLE is finished.
*/
TL_WRITE_ALLOW_READ,
/*
WRITE lock used by concurrent insert. Will allow
READ, if one could use concurrent insert on table.
*/
TL_WRITE_CONCURRENT_INSERT,
/*
parser only! Late bound low_priority flag.
At open_tables() becomes thd->update_lock_default.
*/
TL_WRITE_DEFAULT,
/* Normal WRITE lock */
TL_WRITE,
/* Abort new lock request with an error */
TL_WRITE_ONLY};
enum enum_thr_lock_result { THR_LOCK_SUCCESS= 0, THR_LOCK_ABORTED= 1,
THR_LOCK_WAIT_TIMEOUT= 2, THR_LOCK_DEADLOCK= 3 };
#endif /* MYSYS_DEFINITIONS_H */
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