~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 Sun Microsystems, Inc.

 *

 *  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 <config.h>

#include <drizzled/resource_context.h>

#include <cassert>

using namespace std;

namespace drizzled

{

/** Clear, prepare for reuse. */

void ResourceContext::reset()

{

  monitored= NULL;

  xa_resource_manager= NULL;

  trx_storage_engine= NULL;

  modified_data= false;

}

void ResourceContext::markModifiedData()

{

  assert(isStarted());

  modified_data= true;

}

bool ResourceContext::hasModifiedData() const

{

  assert(isStarted());

  return modified_data;

}

bool ResourceContext::isStarted() const

{

  return monitored != NULL;

}

void ResourceContext::coalesceWith(const ResourceContext *stmt_ctx)

{

  /*

    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(isStarted());

  if (stmt_ctx->hasModifiedData())

    markModifiedData();

}

} /* namespace drizzled */