drh
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/*
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** Copyright (c) 2001 D. Richard Hipp
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**
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** This program is free software; you can redistribute it and/or
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** modify it under the terms of the GNU General Public
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** License as published by the Free Software Foundation; either
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** version 2 of the License, or (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** General Public License for more details.
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**
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** You should have received a copy of the GNU General Public
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** License along with this library; if not, write to the
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** Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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** Boston, MA 02111-1307, USA.
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**
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** Author contact information:
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** drh@hwaci.com
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** http://www.hwaci.com/drh/
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**
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*************************************************************************
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** This header file defines the interface that the sqlite page cache
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** subsystem. The page cache subsystem reads and writes a file a page
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** at a time and provides a journal for rollback.
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**
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** @(#) $Id: pager.h,v 1.10 2001/09/15 13:15:13 drh Exp $
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*/
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/*
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** The size of one page
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*/
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#define SQLITE_PAGE_SIZE 1024
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/*
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** Maximum number of pages in one database. (This is a limitation of
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** imposed by 4GB files size limits.)
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*/
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#define SQLITE_MAX_PAGE 1073741823
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/*
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** The type used to represent a page number. The first page in a file
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** is called page 1. 0 is used to represent "not a page".
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*/
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typedef unsigned int Pgno;
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/*
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** Each open file is managed by a separate instance of the "Pager" structure.
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*/
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typedef struct Pager Pager;
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int sqlitepager_open(Pager **ppPager,const char *zFilename,int nPage,int nEx);
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void sqlitepager_set_destructor(Pager*, void(*)(void*));
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void sqlitepager_set_cachesize(Pager*, int);
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int sqlitepager_close(Pager *pPager);
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int sqlitepager_get(Pager *pPager, Pgno pgno, void **ppPage);
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void *sqlitepager_lookup(Pager *pPager, Pgno pgno);
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int sqlitepager_ref(void*);
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int sqlitepager_unref(void*);
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Pgno sqlitepager_pagenumber(void*);
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int sqlitepager_write(void*);
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int sqlitepager_iswriteable(void*);
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int sqlitepager_pagecount(Pager*);
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int sqlitepager_commit(Pager*);
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int sqlitepager_rollback(Pager*);
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int sqlitepager_isreadonly(Pager*);
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int *sqlitepager_stats(Pager*);
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#ifdef SQLITE_TEST
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void sqlitepager_refdump(Pager*);
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int pager_refinfo_enable;
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#endif
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