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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
*/
#include <drizzled/server_includes.h>
#include <drizzled/ha_trx_info.h>
#include <drizzled/plugin/storage_engine.h>
#include <drizzled/session.h>
using namespace drizzled;
void Ha_trx_info::register_ha(Session_TRANS *trans,
plugin::StorageEngine *engine_arg)
{
assert(m_flags == 0);
assert(m_engine == NULL);
assert(m_next == NULL);
m_engine= engine_arg;
m_flags= (int) TRX_READ_ONLY; /* Assume read-only at start. */
m_next= trans->ha_list;
trans->ha_list= this;
}
/** Clear, prepare for reuse. */
void Ha_trx_info::reset()
{
m_next= NULL;
m_engine= NULL;
m_flags= 0;
}
void Ha_trx_info::set_trx_read_write()
{
assert(is_started());
m_flags|= (int) TRX_READ_WRITE;
}
bool Ha_trx_info::is_trx_read_write() const
{
assert(is_started());
return m_flags & (int) TRX_READ_WRITE;
}
bool Ha_trx_info::is_started() const
{
return m_engine != NULL;
}
/** Mark this transaction read-write if the argument is read-write. */
void Ha_trx_info::coalesce_trx_with(const Ha_trx_info *stmt_trx)
{
/*
Must be called only after the transaction has been started.
Can be called many times, e.g. when we have many
read-write statements in a transaction.
*/
assert(is_started());
if (stmt_trx->is_trx_read_write())
set_trx_read_write();
}
Ha_trx_info *Ha_trx_info::next() const
{
assert(is_started());
return m_next;
}
plugin::StorageEngine *Ha_trx_info::engine() const
{
assert(is_started());
return m_engine;
}
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