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  • Committer: Eric Day
  • Date: 2010-01-07 20:02:38 UTC
  • mfrom: (1259.4.2 staging)
  • mto: This revision was merged to the branch mainline in revision 1271.
  • Revision ID: eday@oddments.org-20100107200238-uqw8v6kv9pl7nny5
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mysys/definitions.h
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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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                     /* 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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                     /*
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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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                     /* 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 */