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/*****************************************************************************
Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2013, 2017, MariaDB Corporation.
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/fsp0fsp.ic
File space management
Created 12/18/1995 Heikki Tuuri
*******************************************************/
#ifndef UNIV_INNOCHECKSUM
/** Checks if a page address is an extent descriptor page address.
@param[in] page_id page id
@param[in] page_size page size
@return TRUE if a descriptor page */
UNIV_INLINE
ibool
fsp_descr_page(
const page_id_t& page_id,
const page_size_t& page_size)
{
return((page_id.page_no() & (page_size.physical() - 1))
== FSP_XDES_OFFSET);
}
/** Calculates the descriptor index within a descriptor page.
@param[in] page_size page size
@param[in] offset page offset
@return descriptor index */
UNIV_INLINE
ulint
xdes_calc_descriptor_index(
const page_size_t& page_size,
ulint offset)
{
return(ut_2pow_remainder(offset, page_size.physical())
/ FSP_EXTENT_SIZE);
}
#endif /*!UNIV_INNOCHECKSUM */
/**********************************************************************//**
Gets a descriptor bit of a page.
@return TRUE if free */
UNIV_INLINE
ibool
xdes_get_bit(
/*=========*/
const xdes_t* descr, /*!< in: descriptor */
ulint bit, /*!< in: XDES_FREE_BIT or XDES_CLEAN_BIT */
ulint offset) /*!< in: page offset within extent:
0 ... FSP_EXTENT_SIZE - 1 */
{
ut_ad(offset < FSP_EXTENT_SIZE);
ut_ad(bit == XDES_FREE_BIT || bit == XDES_CLEAN_BIT);
ulint index = bit + XDES_BITS_PER_PAGE * offset;
ulint bit_index = index % 8;
ulint byte_index = index / 8;
return(ut_bit_get_nth(
mach_read_ulint(descr + XDES_BITMAP + byte_index,
MLOG_1BYTE),
bit_index));
}
#ifndef UNIV_INNOCHECKSUM
/** Calculates the page where the descriptor of a page resides.
@param[in] page_size page size
@param[in] offset page offset
@return descriptor page offset */
UNIV_INLINE
ulint
xdes_calc_descriptor_page(
const page_size_t& page_size,
ulint offset)
{
compile_time_assert(UNIV_PAGE_SIZE_MAX > XDES_ARR_OFFSET
+ (UNIV_PAGE_SIZE_MAX / FSP_EXTENT_SIZE_MAX)
* XDES_SIZE_MAX);
compile_time_assert(UNIV_PAGE_SIZE_MIN > XDES_ARR_OFFSET
+ (UNIV_PAGE_SIZE_MIN / FSP_EXTENT_SIZE_MIN)
* XDES_SIZE_MIN);
ut_ad(srv_page_size > XDES_ARR_OFFSET
+ (srv_page_size / FSP_EXTENT_SIZE)
* XDES_SIZE);
ut_ad(UNIV_ZIP_SIZE_MIN > XDES_ARR_OFFSET
+ (UNIV_ZIP_SIZE_MIN / FSP_EXTENT_SIZE)
* XDES_SIZE);
#ifdef UNIV_DEBUG
if (page_size.is_compressed()) {
ut_a(page_size.physical() > XDES_ARR_OFFSET
+ (page_size.physical() / FSP_EXTENT_SIZE) * XDES_SIZE);
}
#endif /* UNIV_DEBUG */
return(ut_2pow_round(offset, page_size.physical()));
}
#endif /* !UNIV_INNOCHECKSUM */
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