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Overview
| Comment: | When sqlite3PagerPagecount() is called without any locks, always return the physical file size, not the logical file size. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
4016b422286587beda7323052d27821a |
| User & Date: | drh 2010-05-04 18:50:40 |
Context
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2010-05-05
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| 00:05 | When the in single-threaded mode, the sqlite3_mutex_alloc() interface still returns a non-NULL value. The mutex doesn't do anything, but it tests non-NULL. This way, extensions (or VFSes) that use sqlite3_mutex_alloc() can tell the difference between an OOM error and mutexes being disabled. (check-in: 451fd175 user: drh tags: trunk) | |
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2010-05-04
| ||
| 18:50 | When sqlite3PagerPagecount() is called without any locks, always return the physical file size, not the logical file size. (check-in: 4016b422 user: drh tags: trunk) | |
| 17:38 | Be sure to release all wal-index locks before closing the wal-index. (check-in: b15b67fa user: drh tags: trunk) | |
Changes
Changes to src/pager.c.
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** Regardless of mxPage, return the current maximum page count.
*/
int sqlite3PagerMaxPageCount(Pager *pPager, int mxPage){
int nPage;
if( mxPage>0 ){
pPager->mxPgno = mxPage;
}
sqlite3PagerPagecount(pPager, &nPage);
assert( pPager->mxPgno>=nPage );
return pPager->mxPgno;
}
/*
** The following set of routines are used to disable the simulated
** I/O error mechanism. These routines are used to avoid simulated
** errors in places where we do not care about errors.
................................................................................
/* Determine the number of pages in the file. Store this in nPage. */
if( pPager->dbSizeValid ){
nPage = pPager->dbSize;
}else{
int rc; /* Error returned by OsFileSize() */
i64 n = 0; /* File size in bytes returned by OsFileSize() */
if( pagerUseWal(pPager) ){
sqlite3WalDbsize(pPager->pWal, &nPage);
}
if( nPage==0 ){
assert( isOpen(pPager->fd) || pPager->tempFile );
if( isOpen(pPager->fd) ){
if( SQLITE_OK!=(rc = sqlite3OsFileSize(pPager->fd, &n)) ){
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** Regardless of mxPage, return the current maximum page count.
*/
int sqlite3PagerMaxPageCount(Pager *pPager, int mxPage){
int nPage;
if( mxPage>0 ){
pPager->mxPgno = mxPage;
}
if( pPager->state!=PAGER_UNLOCK ){
sqlite3PagerPagecount(pPager, &nPage);
assert( pPager->mxPgno>=nPage );
}
return pPager->mxPgno;
}
/*
** The following set of routines are used to disable the simulated
** I/O error mechanism. These routines are used to avoid simulated
** errors in places where we do not care about errors.
................................................................................
/* Determine the number of pages in the file. Store this in nPage. */
if( pPager->dbSizeValid ){
nPage = pPager->dbSize;
}else{
int rc; /* Error returned by OsFileSize() */
i64 n = 0; /* File size in bytes returned by OsFileSize() */
if( pagerUseWal(pPager) && pPager->state!=PAGER_UNLOCK ){
sqlite3WalDbsize(pPager->pWal, &nPage);
}
if( nPage==0 ){
assert( isOpen(pPager->fd) || pPager->tempFile );
if( isOpen(pPager->fd) ){
if( SQLITE_OK!=(rc = sqlite3OsFileSize(pPager->fd, &n)) ){
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