/*****************************************************************************

Copyright (c) 2010, Oracle and/or its affiliates. All Rights Reserved.

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 Street, Suite 500, Boston, MA 02110-1335 USA

*****************************************************************************/

/******************************************************************//**
@file include/dict0priv.ic
Data dictionary system private include file

Created  Wed 13 Oct 2010 16:10:14 EST Sunny Bains
***********************************************************************/

#include "dict0dict.h"
#include "dict0load.h"
#include "dict0priv.h"
#ifndef UNIV_HOTBACKUP

/**********************************************************************//**
Gets a table; loads it to the dictionary cache if necessary. A low-level
function.
@return	table, NULL if not found */
UNIV_INLINE
dict_table_t*
dict_table_get_low(
/*===============*/
	const char*	table_name)	/*!< in: table name */
{
	dict_table_t*	table;

	ut_ad(table_name);
	ut_ad(mutex_own(&(dict_sys->mutex)));

	table = dict_table_check_if_in_cache_low(table_name);

	if (table && table->corrupted) {
		fprintf(stderr, "InnoDB: table");
		ut_print_name(stderr, NULL, TRUE, table->name);
		if (srv_load_corrupted) {
			fputs(" is corrupted, but"
			      " innodb_force_load_corrupted is set\n", stderr);
		} else {
			fputs(" is corrupted\n", stderr);
			return(NULL);
		}
	}

	if (table == NULL) {
		table = dict_load_table(table_name, TRUE, DICT_ERR_IGNORE_NONE);
	}

	ut_ad(!table || table->cached);

	return(table);
}

/**********************************************************************//**
Returns a table object based on table id.
@return	table, NULL if does not exist */
UNIV_INLINE
dict_table_t*
dict_table_open_on_id_low(
/*======================*/
	table_id_t	table_id)	/*!< in: table id */
{
	dict_table_t*	table;
	ulint		fold;

	ut_ad(mutex_own(&(dict_sys->mutex)));

	/* Look for the table name in the hash table */
	fold = ut_fold_ull(table_id);

	HASH_SEARCH(id_hash, dict_sys->table_id_hash, fold,
		    dict_table_t*, table, ut_ad(table->cached),
		    table->id == table_id);
	if (table == NULL) {
		table = dict_load_table_on_id(table_id);
	}

	ut_ad(!table || table->cached);

	/* TODO: should get the type information from MySQL */

	return(table);
}

/**********************************************************************//**
Checks if a table is in the dictionary cache.
@return	table, NULL if not found */
UNIV_INLINE
dict_table_t*
dict_table_check_if_in_cache_low(
/*=============================*/
	const char*	table_name)	/*!< in: table name */
{
	dict_table_t*	table;
	ulint		table_fold;

	ut_ad(table_name);
	ut_ad(mutex_own(&(dict_sys->mutex)));

	/* Look for the table name in the hash table */
	table_fold = ut_fold_string(table_name);

	HASH_SEARCH(name_hash, dict_sys->table_hash, table_fold,
		    dict_table_t*, table, ut_ad(table->cached),
		    !strcmp(table->name, table_name));
	return(table);
}
#endif /*! UNIV_HOTBACKUP */