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/*****************************************************************************
Copyright (c) 1995, 2012, 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.
@return TRUE if a descriptor page */
UNIV_INLINE
ibool
fsp_descr_page(
/*===========*/
ulint zip_size,/*!< in: compressed page size in bytes;
0 for uncompressed pages */
ulint page_no)/*!< in: page number */
{
ut_ad(ut_is_2pow(zip_size));
if (!zip_size) {
return((page_no & (UNIV_PAGE_SIZE - 1)) == FSP_XDES_OFFSET);
}
return((page_no & (zip_size - 1)) == FSP_XDES_OFFSET);
}
/********************************************************************//**
Determine if the tablespace is compressed from dict_table_t::flags.
@return TRUE if compressed, FALSE if not compressed */
UNIV_INLINE
ibool
fsp_flags_is_compressed(
/*====================*/
ulint flags) /*!< in: tablespace flags */
{
return(FSP_FLAGS_GET_ZIP_SSIZE(flags) != 0);
}
#endif /* !UNIV_INNOCHECKSUM */
/********************************************************************//**
Extract the zip size from tablespace flags.
@return compressed page size of the file-per-table tablespace in bytes,
or zero if the table is not compressed. */
UNIV_INLINE
ulint
fsp_flags_get_zip_size(
/*===================*/
ulint flags) /*!< in: tablespace flags */
{
ulint zip_size = 0;
ulint ssize = FSP_FLAGS_GET_ZIP_SSIZE(flags);
/* Convert from a 'log2 minus 9' to a page size in bytes. */
if (ssize) {
zip_size = ((UNIV_ZIP_SIZE_MIN >> 1) << ssize);
ut_ad(zip_size <= UNIV_ZIP_SIZE_MAX);
}
return(zip_size);
}
/********************************************************************//**
Extract the page size from tablespace flags.
@return page size of the tablespace in bytes */
UNIV_INLINE
ulint
fsp_flags_get_page_size(
/*====================*/
ulint flags) /*!< in: tablespace flags */
{
ulint page_size = 0;
ulint ssize = FSP_FLAGS_GET_PAGE_SSIZE(flags);
/* Convert from a 'log2 minus 9' to a page size in bytes. */
if (UNIV_UNLIKELY(ssize)) {
page_size = ((UNIV_ZIP_SIZE_MIN >> 1) << ssize);
ut_ad(page_size <= UNIV_PAGE_SIZE_MAX);
} else {
/* If the page size was not stored, then it is the
original 16k. */
page_size = UNIV_PAGE_SIZE_ORIG;
}
return(page_size);
}
#ifndef UNIV_INNOCHECKSUM
/********************************************************************//**
Calculates the descriptor index within a descriptor page.
@return descriptor index */
UNIV_INLINE
ulint
xdes_calc_descriptor_index(
/*=======================*/
ulint zip_size, /*!< in: compressed page size in bytes;
0 for uncompressed pages */
ulint offset) /*!< in: page offset */
{
ut_ad(ut_is_2pow(zip_size));
if (zip_size == 0) {
return(ut_2pow_remainder(offset, UNIV_PAGE_SIZE)
/ FSP_EXTENT_SIZE);
} else {
return(ut_2pow_remainder(offset, zip_size) / FSP_EXTENT_SIZE);
}
}
/**********************************************************************//**
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));
}
/********************************************************************//**
Calculates the page where the descriptor of a page resides.
@return descriptor page offset */
UNIV_INLINE
ulint
xdes_calc_descriptor_page(
/*======================*/
ulint zip_size, /*!< in: compressed page size in bytes;
0 for uncompressed pages */
ulint offset) /*!< in: page offset */
{
#ifndef DOXYGEN /* Doxygen gets confused by these */
# if UNIV_PAGE_SIZE_MAX <= XDES_ARR_OFFSET \
+ (UNIV_PAGE_SIZE_MAX / FSP_EXTENT_SIZE_MAX) \
* XDES_SIZE_MAX
# error
# endif
# if UNIV_ZIP_SIZE_MIN <= XDES_ARR_OFFSET \
+ (UNIV_ZIP_SIZE_MIN / FSP_EXTENT_SIZE_MIN) \
* XDES_SIZE_MIN
# error
# endif
#endif /* !DOXYGEN */
ut_ad(UNIV_PAGE_SIZE > XDES_ARR_OFFSET
+ (UNIV_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);
ut_ad(ut_is_2pow(zip_size));
if (zip_size == 0) {
return(ut_2pow_round(offset, UNIV_PAGE_SIZE));
} else {
ut_ad(zip_size > XDES_ARR_OFFSET
+ (zip_size / FSP_EXTENT_SIZE) * XDES_SIZE);
return(ut_2pow_round(offset, zip_size));
}
}
#endif /* !UNIV_INNOCHECKSUM */
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