mariadb/ft/ft_msg.h

/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:

/* The purpose of this file is to provide access to the ft_msg,
 * which is the ephemeral version of the messages that lives in
 * a message buffer.
 */

#ident "$Id$"
/*
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  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation, and provided that the
  following conditions are met:

      * Redistributions of source code must retain this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
        DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the
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      * Redistributions in binary form must reproduce this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
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        PATENT MARKING NOTICE (below), and the PATENT RIGHTS
        GRANT (below) in the documentation and/or other materials
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  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 Street, Fifth Floor, Boston, MA
  02110-1301, USA.

COPYRIGHT NOTICE:

  TokuDB, Tokutek Fractal Tree Indexing Library.
  Copyright (C) 2007-2013 Tokutek, Inc.

DISCLAIMER:

  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.

UNIVERSITY PATENT NOTICE:

  The technology is licensed by the Massachusetts Institute of
  Technology, Rutgers State University of New Jersey, and the Research
  Foundation of State University of New York at Stony Brook under
  United States of America Serial No. 11/760379 and to the patents
  and/or patent applications resulting from it.

PATENT MARKING NOTICE:

  This software is covered by US Patent No. 8,185,551.
  This software is covered by US Patent No. 8,489,638.

PATENT RIGHTS GRANT:

  "THIS IMPLEMENTATION" means the copyrightable works distributed by
  Tokutek as part of the Fractal Tree project.

  "PATENT CLAIMS" means the claims of patents that are owned or
  licensable by Tokutek, both currently or in the future; and that in
  the absence of this license would be infringed by THIS
  IMPLEMENTATION or by using or running THIS IMPLEMENTATION.

  "PATENT CHALLENGE" shall mean a challenge to the validity,
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*/

#pragma once

#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."

/* tree command types */
enum ft_msg_type {
    FT_NONE = 0,
    FT_INSERT = 1,
    FT_DELETE_ANY = 2,  // Delete any matching key.  This used to be called FT_DELETE.
    //FT_DELETE_BOTH = 3,
    FT_ABORT_ANY = 4,   // Abort any commands on any matching key.
    //FT_ABORT_BOTH  = 5, // Abort commands that match both the key and the value
    FT_COMMIT_ANY  = 6,
    //FT_COMMIT_BOTH = 7,
    FT_COMMIT_BROADCAST_ALL = 8, // Broadcast to all leafentries, (commit all transactions).
    FT_COMMIT_BROADCAST_TXN = 9, // Broadcast to all leafentries, (commit specific transaction).
    FT_ABORT_BROADCAST_TXN  = 10, // Broadcast to all leafentries, (commit specific transaction).
    FT_INSERT_NO_OVERWRITE = 11,
    FT_OPTIMIZE = 12,             // Broadcast
    FT_OPTIMIZE_FOR_UPGRADE = 13, // same as FT_OPTIMIZE, but record version number in leafnode
    FT_UPDATE = 14,
    FT_UPDATE_BROADCAST_ALL = 15
};

static inline bool
ft_msg_type_applies_once(enum ft_msg_type type)
{
    bool ret_val;
    switch (type) {
    case FT_INSERT_NO_OVERWRITE:
    case FT_INSERT:
    case FT_DELETE_ANY:
    case FT_ABORT_ANY:
    case FT_COMMIT_ANY:
    case FT_UPDATE:
        ret_val = true;
        break;
    case FT_COMMIT_BROADCAST_ALL:
    case FT_COMMIT_BROADCAST_TXN:
    case FT_ABORT_BROADCAST_TXN:
    case FT_OPTIMIZE:
    case FT_OPTIMIZE_FOR_UPGRADE:
    case FT_UPDATE_BROADCAST_ALL:
    case FT_NONE:
        ret_val = false;
        break;
    default:
        assert(false);
    }
    return ret_val;
}

static inline bool
ft_msg_type_applies_all(enum ft_msg_type type)
{
    bool ret_val;
    switch (type) {
    case FT_NONE:
    case FT_INSERT_NO_OVERWRITE:
    case FT_INSERT:
    case FT_DELETE_ANY:
    case FT_ABORT_ANY:
    case FT_COMMIT_ANY:
    case FT_UPDATE:
        ret_val = false;
        break;
    case FT_COMMIT_BROADCAST_ALL:
    case FT_COMMIT_BROADCAST_TXN:
    case FT_ABORT_BROADCAST_TXN:
    case FT_OPTIMIZE:
    case FT_OPTIMIZE_FOR_UPGRADE:
    case FT_UPDATE_BROADCAST_ALL:
        ret_val = true;
        break;
    default:
        assert(false);
    }
    return ret_val;
}

static inline bool
ft_msg_type_does_nothing(enum ft_msg_type type)
{
    return (type == FT_NONE);
}

typedef struct xids_t *XIDS;

/* tree commands */
struct ft_msg {
    enum ft_msg_type type;
    MSN          msn;          // message sequence number
    XIDS         xids;
    union {
        /* insert or delete */
        struct ft_msg_insert_delete {
            const DBT *key;   // for insert, delete, upsertdel
            const DBT *val;   // for insert, delete, (and it is the "extra" for upsertdel, upsertdel_broadcast_all)
        } id;
    } u;
};

// Message sent into the ft to implement insert, delete, update, etc
typedef struct ft_msg FT_MSG_S;
typedef struct ft_msg *FT_MSG;

uint32_t ft_msg_get_keylen(FT_MSG ft_msg);

uint32_t ft_msg_get_vallen(FT_MSG ft_msg);

XIDS ft_msg_get_xids(FT_MSG ft_msg);

void *ft_msg_get_key(FT_MSG ft_msg);

void *ft_msg_get_val(FT_MSG ft_msg);

enum ft_msg_type ft_msg_get_type(FT_MSG ft_msg);