~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/qcache.h>

#include <drizzled/gettext.h>

int qcache_initializer(st_plugin_int *plugin)

{

  qcache_t *p;

  p= (qcache_t *) malloc(sizeof(qcache_t));

  if (p == NULL) return 1;

  memset(p, 0, sizeof(qcache_t));

  plugin->data= (void *)p;

  if (plugin->plugin->init)

  {

    if (plugin->plugin->init((void *)p))

    {

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

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

      sql_print_error(_("qcache plugin '%s' init() failed"),

		      plugin->name.str);

      goto err;

    }

  }

  return 0;

err:

  free(p);

  return 1;

}

int qcache_finalizer(st_plugin_int *plugin)

{ 

  qcache_t *p= (qcache_t *) plugin->data;

  if (plugin->plugin->deinit)

  {

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

    {

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

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

      sql_print_error(_("qcache plugin '%s' deinit() failed"),

		      plugin->name.str);

    }

  }

  if (p) free(p);

  return 0;

}

/* The plugin_foreach() iterator requires that we

   convert all the parameters of a plugin api entry point

   into just one single void ptr, plus the session.

   So we will take all the additional paramters of qcache_do1,

   and marshall them into a struct of this type, and

   then just pass in a pointer to it.

*/

typedef struct qcache_do1_parms_st

{

  void *parm1;

  void *parm2;

} qcache_do1_parms_t;

/* This gets called by plugin_foreach once for each loaded qcache plugin */

static bool qcache_do1_iterate (Session *session, plugin_ref plugin, void *p)

{

  qcache_t *l= plugin_data(plugin, qcache_t *);

  qcache_do1_parms_t *parms= (qcache_do1_parms_t *) p;

  /* call this loaded qcache plugin's qcache_func1 function pointer */

  if (l && l->qcache_func1)

  {

    if (l->qcache_func1(session, parms->parm1, parms->parm2))

    {

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

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

      sql_print_error(_("qcache plugin '%s' do1() failed"),

		      (char *)plugin_name(plugin));

      return true;

    }

  }

  return false;

}

/* This is the qcache_do1 entry point.

   This gets called by the rest of the Drizzle server code */

bool qcache_do1 (Session *session, void *parm1, void *parm2)

{

  qcache_do1_parms_t parms;

  bool foreach_rv;

  /* marshall the parameters so they will fit into the foreach */

  parms.parm1= parm1;

  parms.parm2= parm2;

  /* call qcache_do1_iterate

     once for each loaded qcache plugin */

  foreach_rv= plugin_foreach(session,

                             qcache_do1_iterate,

                             DRIZZLE_QCACHE_PLUGIN,

                             (void *) &parms);

  return foreach_rv;

}

/* The plugin_foreach() iterator requires that we

   convert all the parameters of a plugin api entry point

   into just one single void ptr, plus the session.

   So we will take all the additional paramters of qcache_do2,

   and marshall them into a struct of this type, and

   then just pass in a pointer to it.

*/

typedef struct qcache_do2_parms_st

{

  void *parm3;

  void *parm4;

} qcache_do2_parms_t;

/* This gets called by plugin_foreach once for each loaded qcache plugin */

static bool qcache_do2_iterate (Session *session, plugin_ref plugin, void *p)

{

  qcache_t *l= plugin_data(plugin, qcache_t *);

  qcache_do2_parms_t *parms= (qcache_do2_parms_t *) p;

  /* call this loaded qcache plugin's qcache_func1 function pointer */

  if (l && l->qcache_func1)

  {

    if (l->qcache_func2(session, parms->parm3, parms->parm4))

    {

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

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

      sql_print_error(_("qcache plugin '%s' qcache_func2() failed"),

		      (char *)plugin_name(plugin));

      return true;

    }

  }

  return false;

}

/* This is the qcache_do2 entry point.

   This gets called by the rest of the Drizzle server code */

bool qcache_do2 (Session *session, void *parm3, void *parm4)

{

  qcache_do2_parms_t parms;

  bool foreach_rv;

  /* marshall the parameters so they will fit into the foreach */

  parms.parm3= parm3;

  parms.parm4= parm4;

  /* call qcache_do2_iterate

     once for each loaded qcache plugin */

  foreach_rv= plugin_foreach(session,

                             qcache_do2_iterate,

                             DRIZZLE_QCACHE_PLUGIN,

                             (void *) &parms);

  return foreach_rv;

}