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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, 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
*/
#pragma once
#include <drizzled/atomics.h>
namespace drizzled
{
typedef uint64_t query_id_t;
class Query_id
{
public:
static Query_id& get_query_id() {
static Query_id the_id;
return the_id;
}
~Query_id();
/* return current query_id value */
query_id_t value() const;
/* increment query_id and return it. */
query_id_t next();
private:
atomic<uint64_t> the_query_id;
Query_id();
Query_id(Query_id const&);
Query_id& operator=(Query_id const&);
};
} /* namespace drizzled */
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