mariadb/storage/tokudb/ft-index/ft/msg.cc

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  This program is free software; you can redistribute it and/or modify
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  TokuFT, 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
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  The technology is licensed by the Massachusetts Institute of
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  Foundation of State University of New York at Stony Brook under
  United States of America Serial No. 11/760379 and to the patents
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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.

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*/

#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."

#include "portability/toku_portability.h"

#include "ft/msg.h"
#include "ft/txn/xids.h"
#include "util/dbt.h"

ft_msg::ft_msg(const DBT *key, const DBT *val, enum ft_msg_type t, MSN m, XIDS x) :
    _key(key ? *key : toku_empty_dbt()),
    _val(val ? *val : toku_empty_dbt()),
    _type(t), _msn(m), _xids(x) {
}

ft_msg ft_msg::deserialize_from_rbuf(struct rbuf *rb, XIDS *x, bool *is_fresh) {
    const void *keyp, *valp;
    uint32_t keylen, vallen;
    enum ft_msg_type t = (enum ft_msg_type) rbuf_char(rb);
    *is_fresh = rbuf_char(rb);
    MSN m = rbuf_MSN(rb);
    toku_xids_create_from_buffer(rb, x);
    rbuf_bytes(rb, &keyp, &keylen);
    rbuf_bytes(rb, &valp, &vallen);

    DBT k, v;
    return ft_msg(toku_fill_dbt(&k, keyp, keylen), toku_fill_dbt(&v, valp, vallen), t, m, *x);
}

ft_msg ft_msg::deserialize_from_rbuf_v13(struct rbuf *rb, MSN m, XIDS *x) {
    const void *keyp, *valp;
    uint32_t keylen, vallen;
    enum ft_msg_type t = (enum ft_msg_type) rbuf_char(rb);
    toku_xids_create_from_buffer(rb, x);
    rbuf_bytes(rb, &keyp, &keylen);
    rbuf_bytes(rb, &valp, &vallen);

    DBT k, v;
    return ft_msg(toku_fill_dbt(&k, keyp, keylen), toku_fill_dbt(&v, valp, vallen), t, m, *x);
}

const DBT *ft_msg::kdbt() const {
    return &_key;
}

const DBT *ft_msg::vdbt() const {
    return &_val;
}

enum ft_msg_type ft_msg::type() const {
    return _type;
}

MSN ft_msg::msn() const {
    return _msn;
}

XIDS ft_msg::xids() const {
    return _xids;
}

size_t ft_msg::total_size() const {
    // Must store two 4-byte lengths
    static const size_t key_val_overhead = 8;

    // 1 byte type, 1 byte freshness, then 8 byte MSN
    static const size_t msg_overhead = 2 + sizeof(MSN);

    static const size_t total_overhead = key_val_overhead + msg_overhead;

    const size_t keyval_size = _key.size + _val.size;
    const size_t xids_size = toku_xids_get_serialize_size(xids());
    return total_overhead + keyval_size + xids_size;
}

void ft_msg::serialize_to_wbuf(struct wbuf *wb, bool is_fresh) const {
    wbuf_nocrc_char(wb, (unsigned char) _type);
    wbuf_nocrc_char(wb, (unsigned char) is_fresh);
    wbuf_MSN(wb, _msn);
    wbuf_nocrc_xids(wb, _xids);
    wbuf_nocrc_bytes(wb, _key.data, _key.size);
    wbuf_nocrc_bytes(wb, _val.data, _val.size);
}