Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Performance improvements in the getAndInitPage() routine of btree.c. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
2aa50f6f2029e3c91a4cb91224df8ec1 |
| User & Date: | drh 2015-11-04 22:31:02 |
Context
|
2015-11-05
| ||
| 11:47 | Remove a #pragma used to work around an issues with MSVC 2012 that has been overcome but subsequent changes. check-in: 8303e4cf user: drh tags: trunk | |
| 03:26 | Remove #pragma that was used to work around an obsolete issue with MSVC 2012. Closed-Leaf check-in: b9b22fae user: mistachkin tags: reoptimizeArm | |
|
2015-11-04
| ||
| 22:31 | Performance improvements in the getAndInitPage() routine of btree.c. check-in: 2aa50f6f user: drh tags: trunk | |
| 20:22 | Rename the sqlite3PagerAcquire() function to sqlite3PagerGet(). The former macro called sqlite3PagerGet() has been removed. check-in: 708253be user: drh tags: trunk | |
Changes
Changes to src/btree.c.
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
....
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
|
/*
** Convert a DbPage obtained from the pager into a MemPage used by
** the btree layer.
*/
static MemPage *btreePageFromDbPage(DbPage *pDbPage, Pgno pgno, BtShared *pBt){
MemPage *pPage = (MemPage*)sqlite3PagerGetExtra(pDbPage);
pPage->aData = sqlite3PagerGetData(pDbPage);
pPage->pDbPage = pDbPage;
pPage->pBt = pBt;
pPage->pgno = pgno;
pPage->hdrOffset = pgno==1 ? 100 : 0;
return pPage;
}
/*
** Get a page from the pager. Initialize the MemPage.pBt and
** MemPage.aData elements if needed. See also: btreeGetUnusedPage().
**
................................................................................
rc = SQLITE_CORRUPT_BKPT;
goto getAndInitPage_error;
}
rc = sqlite3PagerGet(pBt->pPager, pgno, (DbPage**)&pDbPage, bReadOnly);
if( rc ){
goto getAndInitPage_error;
}
*ppPage = btreePageFromDbPage(pDbPage, pgno, pBt);
if( (*ppPage)->isInit==0 ){
rc = btreeInitPage(*ppPage);
if( rc!=SQLITE_OK ){
releasePage(*ppPage);
goto getAndInitPage_error;
}
}
/* If obtaining a child page for a cursor, we must verify that the page is
** compatible with the root page. */
if( pCur
&& ((*ppPage)->nCell<1 || (*ppPage)->intKey!=pCur->curIntKey)
){
rc = SQLITE_CORRUPT_BKPT;
releasePage(*ppPage);
goto getAndInitPage_error;
}
return SQLITE_OK;
getAndInitPage_error:
|
>
|
|
|
|
|
>
>
|
>
>
>
<
|
<
|
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
....
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
|
/*
** Convert a DbPage obtained from the pager into a MemPage used by
** the btree layer.
*/
static MemPage *btreePageFromDbPage(DbPage *pDbPage, Pgno pgno, BtShared *pBt){
MemPage *pPage = (MemPage*)sqlite3PagerGetExtra(pDbPage);
if( pgno!=pPage->pgno ){
pPage->aData = sqlite3PagerGetData(pDbPage);
pPage->pDbPage = pDbPage;
pPage->pBt = pBt;
pPage->pgno = pgno;
pPage->hdrOffset = pgno==1 ? 100 : 0;
}
assert( pPage->aData==sqlite3PagerGetData(pDbPage) );
return pPage;
}
/*
** Get a page from the pager. Initialize the MemPage.pBt and
** MemPage.aData elements if needed. See also: btreeGetUnusedPage().
**
................................................................................
rc = SQLITE_CORRUPT_BKPT;
goto getAndInitPage_error;
}
rc = sqlite3PagerGet(pBt->pPager, pgno, (DbPage**)&pDbPage, bReadOnly);
if( rc ){
goto getAndInitPage_error;
}
*ppPage = (MemPage*)sqlite3PagerGetExtra(pDbPage);
if( (*ppPage)->isInit==0 ){
btreePageFromDbPage(pDbPage, pgno, pBt);
rc = btreeInitPage(*ppPage);
if( rc!=SQLITE_OK ){
releasePage(*ppPage);
goto getAndInitPage_error;
}
}
assert( (*ppPage)->pgno==pgno );
assert( (*ppPage)->aData==sqlite3PagerGetData(pDbPage) );
/* If obtaining a child page for a cursor, we must verify that the page is
** compatible with the root page. */
if( pCur && ((*ppPage)->nCell<1 || (*ppPage)->intKey!=pCur->curIntKey) ){
rc = SQLITE_CORRUPT_BKPT;
releasePage(*ppPage);
goto getAndInitPage_error;
}
return SQLITE_OK;
getAndInitPage_error:
|