~drizzle-trunk/drizzle/development

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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 <config.h>
#include <definitions.h>
#include <drizzled/query_id.h>
#include <mysys/my_pthread.h>

Query_id::Query_id() : the_query_id(1)
{
  /* pthread_mutex_init always returns 0 */
  (void)pthread_mutex_init(&LOCK_query_id, MY_MUTEX_INIT_FAST);
}

Query_id::~Query_id()
{
  pthread_mutex_destroy(&LOCK_query_id);
}

query_id_t Query_id::value() const
{
  return the_query_id;
}

query_id_t Query_id::next()
{
  pthread_mutex_lock(&LOCK_query_id);
  query_id_t ret= the_query_id++;
  pthread_mutex_unlock(&LOCK_query_id);
  return ret;
}