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Overview
Comment:Discard the pager-cache when the page-size is changed. (CVS 3719)
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SHA1: e4209f7193d160709b0d8b5cd358df5649a97dc0
User & Date: danielk1977 2007-03-26 15:46:01.000
Context
2007-03-26
16:13
Run some malloc() tests with exclusive-access mode. (CVS 3720) (check-in: 9ebba46902 user: danielk1977 tags: trunk)
15:46
Discard the pager-cache when the page-size is changed. (CVS 3719) (check-in: e4209f7193 user: danielk1977 tags: trunk)
13:48
Avoid unnecessary calls to pager_unwritelock() when in exclusive-access mode. Add the speed2.test script to the test suite. (CVS 3718) (check-in: ab53f50863 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/pager.c.
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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.298 2007/03/26 13:48:13 drh Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
#include "os.h"
#include "pager.h"
#include <assert.h>
#include <string.h>








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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.299 2007/03/26 15:46:01 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
#include "os.h"
#include "pager.h"
#include <assert.h>
#include <string.h>
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/*
** Set the page size.  Return the new size.  If the suggest new page
** size is inappropriate, then an alternative page size is selected
** and returned.
*/
int sqlite3PagerSetPagesize(Pager *pPager, int pageSize){
  assert( pageSize>=512 && pageSize<=SQLITE_MAX_PAGE_SIZE );
  if( !pPager->memDb ){

    pPager->pageSize = pageSize;
    sqlite3ReallocOrFree((void **)&pPager->pTmpSpace, pageSize);
  }
  return pPager->pageSize;
}

/*








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/*
** Set the page size.  Return the new size.  If the suggest new page
** size is inappropriate, then an alternative page size is selected
** and returned.
*/
int sqlite3PagerSetPagesize(Pager *pPager, int pageSize){
  assert( pageSize>=512 && pageSize<=SQLITE_MAX_PAGE_SIZE );
  if( !pPager->memDb && pPager->nRef==0 ){
    pager_reset(pPager);
    pPager->pageSize = pageSize;
    sqlite3ReallocOrFree((void **)&pPager->pTmpSpace, pageSize);
  }
  return pPager->pageSize;
}

/*
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