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0a1c3477bf
MySQL 5.7 introduced the class page_size_t and increased the size of buffer pool page descriptors by introducing this object to them. Maybe the intention of this exercise was to prepare for a future where the buffer pool could accommodate multiple page sizes. But that future never arrived, not even in MySQL 8.0. It is much easier to manage a pool of a single page size, and typically all storage devices of an InnoDB instance benefit from using the same page size. Let us remove page_size_t from MariaDB Server. This will make it easier to remove support for ROW_FORMAT=COMPRESSED (or make it a compile-time option) in the future, just by removing various occurrences of zip_size.
51 lines
1.8 KiB
Text
51 lines
1.8 KiB
Text
/*****************************************************************************
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Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2013, 2019, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/fsp0fsp.ic
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File space management
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Created 12/18/1995 Heikki Tuuri
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*******************************************************/
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/**********************************************************************//**
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Gets a descriptor bit of a page.
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@return TRUE if free */
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UNIV_INLINE
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ibool
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xdes_get_bit(
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/*=========*/
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const xdes_t* descr, /*!< in: descriptor */
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ulint bit, /*!< in: XDES_FREE_BIT or XDES_CLEAN_BIT */
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ulint offset) /*!< in: page offset within extent:
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0 ... FSP_EXTENT_SIZE - 1 */
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{
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ut_ad(offset < FSP_EXTENT_SIZE);
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ut_ad(bit == XDES_FREE_BIT || bit == XDES_CLEAN_BIT);
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ulint index = bit + XDES_BITS_PER_PAGE * offset;
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ulint bit_index = index % 8;
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ulint byte_index = index / 8;
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return(ut_bit_get_nth(
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mach_read_ulint(descr + XDES_BITMAP + byte_index,
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MLOG_1BYTE),
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bit_index));
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}
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