~drizzle-trunk/drizzle/development

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

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

 *

 *  Copyright (C) 2008 Mark Atwood

 *

 *  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/scheduling.h>

#include <drizzled/gettext.h>

#include <drizzled/connect.h>

Scheduler *thread_scheduler= NULL;

static bool scheduler_inited= false; /* We must insist that only one of these plugins get loaded at a time */

extern char *opt_scheduler;

Scheduler &get_thread_scheduler()

{

  assert(thread_scheduler != NULL);

  return *thread_scheduler;

}

int scheduling_initializer(st_plugin_int *plugin)

{

  if (memcmp(plugin->plugin->name, opt_scheduler, strlen(opt_scheduler)))

    return 0;

  if (scheduler_inited)

  {

    fprintf(stderr, "You cannot load more then one scheduler plugin\n");

    exit(1);

  }

  assert(plugin->plugin->init); /* Find poorly designed plugins */

  if (plugin->plugin->init((void *)&thread_scheduler))

  {

    /* 

      TRANSLATORS> The leading word "scheduling" is the name

      of the plugin api, and so should not be translated. 

    */

    errmsg_printf(ERRMSG_LVL_ERROR, _("scheduling plugin '%s' init() failed"),

	                plugin->name.str);

      return 1;

  }

  scheduler_inited= true;

  /* We populate so we can find which plugin was initialized later on */

  plugin->data= (void *)thread_scheduler;

  plugin->state= PLUGIN_IS_READY;

  return 0;

}

int scheduling_finalizer(st_plugin_int *plugin)

{

  /* We know which one we initialized since its data pointer is filled */

  if (plugin->plugin->deinit && plugin->data)

  {

    if (plugin->plugin->deinit((void *)thread_scheduler))

    {

      /* TRANSLATORS: The leading word "scheduling" is the name

         of the plugin api, and so should not be translated. */

      errmsg_printf(ERRMSG_LVL_ERROR,

                    _("scheduling plugin '%s' deinit() failed"),

                    plugin->name.str);

    }

  }

  return 0;

}