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a786f50de5
Thanks to MDEV-15058, there is only one InnoDB buffer pool. Allocating buf_pool statically removes one level of pointer indirection and makes code more readable, and removes the awkward initialization of some buf_pool members. While doing this, we will also declare some buf_pool_t data members private and replace some functions with member functions. This is mostly affecting buffer pool resizing. This is not aiming to be a complete rewrite of buf_pool_t to a proper class. Most of the buffer pool interface, such as buf_page_get_gen(), will remain in the C programming style for now. buf_pool_t::withdrawing: Replaces buf_pool_withdrawing. buf_pool_t::withdraw_clock_: Replaces buf_withdraw_clock. buf_pool_t::create(): Repalces buf_pool_init(). buf_pool_t::close(): Replaces buf_pool_free(). buf_bool_t::will_be_withdrawn(): Replaces buf_block_will_be_withdrawn(), buf_frame_will_be_withdrawn(). buf_pool_t::clear_hash_index(): Replaces buf_pool_clear_hash_index(). buf_pool_t::get_n_pages(): Replaces buf_pool_get_n_pages(). buf_pool_t::validate(): Replaces buf_validate(). buf_pool_t::print(): Replaces buf_print(). buf_pool_t::block_from_ahi(): Replaces buf_block_from_ahi(). buf_pool_t::is_block_field(): Replaces buf_pointer_is_block_field(). buf_pool_t::is_block_mutex(): Replaces buf_pool_is_block_mutex(). buf_pool_t::is_block_lock(): Replaces buf_pool_is_block_lock(). buf_pool_t::is_obsolete(): Replaces buf_pool_is_obsolete(). buf_pool_t::io_buf: Make default-constructible. buf_pool_t::io_buf::create(): Delayed 'constructor' buf_pool_t::io_buf::close(): Early 'destructor' HazardPointer: Make default-constructible. Define all member functions inline, also for derived classes.
94 lines
3 KiB
C
94 lines
3 KiB
C
/*****************************************************************************
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Copyright (c) 2006, 2016, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2018, 2020, 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, Fifth Floor, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/buf0buddy.h
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Binary buddy allocator for compressed pages
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Created December 2006 by Marko Makela
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*******************************************************/
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#ifndef buf0buddy_h
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#define buf0buddy_h
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#include "buf0types.h"
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/**
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@param[in] block size in bytes
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@return index of buf_pool.zip_free[], or BUF_BUDDY_SIZES */
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inline
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ulint
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buf_buddy_get_slot(ulint size)
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{
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ulint i;
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ulint s;
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ut_ad(ut_is_2pow(size));
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ut_ad(size >= UNIV_ZIP_SIZE_MIN);
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ut_ad(size <= srv_page_size);
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for (i = 0, s = BUF_BUDDY_LOW; s < size; i++, s <<= 1) {
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}
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ut_ad(i <= BUF_BUDDY_SIZES);
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return i;
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}
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/** Allocate a ROW_FORMAT=COMPRESSED block.
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@param[in] i index of buf_pool.zip_free[] or BUF_BUDDY_SIZES
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@param[out] lru whether buf_pool.mutex was temporarily released
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@return allocated block, never NULL */
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byte *buf_buddy_alloc_low(ulint i, bool *lru) MY_ATTRIBUTE((malloc));
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/** Allocate a ROW_FORMAT=COMPRESSED block.
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The caller must not hold buf_pool.mutex nor buf_pool.zip_mutex nor any
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block->mutex.
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@param[in] size compressed page size
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@param[out] lru whether buf_pool.mutex was temporarily released
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@return allocated block, never NULL */
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inline byte *buf_buddy_alloc(ulint size, bool *lru= nullptr)
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{
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return buf_buddy_alloc_low(buf_buddy_get_slot(size), lru);
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}
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/** Deallocate a block.
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@param[in] buf block to be freed, must not be pointed to
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by the buffer pool
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@param[in] i index of buf_pool.zip_free[], or BUF_BUDDY_SIZES */
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void buf_buddy_free_low(void* buf, ulint i);
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/** Deallocate a block.
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@param[in] buf block to be freed, must not be pointed to
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by the buffer pool
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@param[in] size block size in bytes */
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inline void buf_buddy_free(void* buf, ulint size)
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{
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buf_buddy_free_low(buf, buf_buddy_get_slot(size));
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}
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/** Try to reallocate a block.
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@param[in] buf block to be reallocated, must be pointed
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to by the buffer pool
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@param[in] size block size, up to srv_page_size
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@retval false if failed because of no free blocks. */
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bool buf_buddy_realloc(void* buf, ulint size);
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/** Combine all pairs of free buddies. */
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void buf_buddy_condense_free();
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#endif /* buf0buddy_h */
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