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92 lines
3.2 KiB
C
92 lines
3.2 KiB
C
/*****************************************************************************
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Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved
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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., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/buf0types.h
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The database buffer pool global types for the directory
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Created 11/17/1995 Heikki Tuuri
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*******************************************************/
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#ifndef buf0types_h
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#define buf0types_h
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#include "page0types.h"
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/** Buffer page (uncompressed or compressed) */
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typedef struct buf_page_struct buf_page_t;
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/** Buffer block for which an uncompressed page exists */
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typedef struct buf_block_struct buf_block_t;
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/** Buffer pool chunk comprising buf_block_t */
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typedef struct buf_chunk_struct buf_chunk_t;
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/** Buffer pool comprising buf_chunk_t */
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typedef struct buf_pool_struct buf_pool_t;
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/** Buffer pool statistics struct */
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typedef struct buf_pool_stat_struct buf_pool_stat_t;
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/** Buffer pool buddy statistics struct */
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typedef struct buf_buddy_stat_struct buf_buddy_stat_t;
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/** A buffer frame. @see page_t */
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typedef byte buf_frame_t;
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/** Flags for flush types */
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enum buf_flush {
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BUF_FLUSH_LRU = 0, /*!< flush via the LRU list */
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BUF_FLUSH_SINGLE_PAGE, /*!< flush a single page */
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BUF_FLUSH_LIST, /*!< flush via the flush list
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of dirty blocks */
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BUF_FLUSH_N_TYPES /*!< index of last element + 1 */
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};
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/** Flags for io_fix types */
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enum buf_io_fix {
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BUF_IO_NONE = 0, /**< no pending I/O */
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BUF_IO_READ, /**< read pending */
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BUF_IO_WRITE, /**< write pending */
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BUF_IO_PIN /**< disallow relocation of
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block and its removal of from
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the flush_list */
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};
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/** Algorithm to remove the pages for a tablespace from the buffer pool.
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@See buf_LRU_flush_or_remove_pages(). */
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enum buf_remove_t {
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BUF_REMOVE_ALL_NO_WRITE, /*!< Remove all pages from the buffer
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pool, don't write or sync to disk */
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BUF_REMOVE_FLUSH_NO_WRITE /*!< Remove only, from the flush list,
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don't write or sync to disk */
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};
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/** Parameters of binary buddy system for compressed pages (buf0buddy.h) */
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/* @{ */
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#define BUF_BUDDY_LOW_SHIFT PAGE_ZIP_MIN_SIZE_SHIFT
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#define BUF_BUDDY_LOW (1 << BUF_BUDDY_LOW_SHIFT)
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#define BUF_BUDDY_SIZES (UNIV_PAGE_SIZE_SHIFT - BUF_BUDDY_LOW_SHIFT)
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#define BUF_BUDDY_SIZES_MAX (UNIV_PAGE_SIZE_SHIFT_MAX - BUF_BUDDY_LOW_SHIFT)
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/*!< number of buddy sizes */
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/** twice the maximum block size of the buddy system;
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the underlying memory is aligned by this amount:
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this must be equal to UNIV_PAGE_SIZE */
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#define BUF_BUDDY_HIGH ((ulint)BUF_BUDDY_LOW << BUF_BUDDY_SIZES)
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/* @} */
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#endif
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