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520.6.4
by Monty Taylor
Moved thr_lock.h out of common_includes. |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2008 Sun Microsystems
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*
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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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*
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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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*
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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 St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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*
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* Mostly constants and enums used by mysys
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*/
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#ifndef MYSYS_DEFINITIONS_H
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#define MYSYS_DEFINITIONS_H
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enum thr_lock_type { TL_IGNORE=-1, |
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/* UNLOCK ANY LOCK */
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TL_UNLOCK, |
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/* Read lock */
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TL_READ, |
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TL_READ_WITH_SHARED_LOCKS, |
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/* High prior. than TL_WRITE. Allow concurrent insert */
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TL_READ_HIGH_PRIORITY, |
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/* READ, Don't allow concurrent insert */
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TL_READ_NO_INSERT, |
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/*
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Write lock, but allow other threads to read / write.
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Used by BDB tables in MySQL to mark that someone is
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reading/writing to the table.
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*/
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TL_WRITE_ALLOW_WRITE, |
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/*
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Write lock, but allow other threads to read.
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Used by ALTER TABLE in MySQL to allow readers
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to use the table until ALTER TABLE is finished.
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*/
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TL_WRITE_ALLOW_READ, |
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/*
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WRITE lock used by concurrent insert. Will allow
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READ, if one could use concurrent insert on table.
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*/
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TL_WRITE_CONCURRENT_INSERT, |
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/* Write used by INSERT DELAYED. Allows READ locks */
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TL_WRITE_DELAYED, |
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/*
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parser only! Late bound low_priority flag.
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At open_tables() becomes thd->update_lock_default.
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*/
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TL_WRITE_DEFAULT, |
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/* WRITE lock that has lower priority than TL_READ */
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TL_WRITE_LOW_PRIORITY, |
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/* Normal WRITE lock */
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TL_WRITE, |
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/* Abort new lock request with an error */
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TL_WRITE_ONLY}; |
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enum enum_thr_lock_result { THR_LOCK_SUCCESS= 0, THR_LOCK_ABORTED= 1, |
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THR_LOCK_WAIT_TIMEOUT= 2, THR_LOCK_DEADLOCK= 3 }; |
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#endif /* MYSYS_DEFINITIONS_H */ |