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Try to better detect when the library is compiled for large file support (LFS)

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but the support is not available in the host OS kernel. (CVS 782)

FossilOrigin-Name: a29d60ecc5ee3f535142a81f56eecbef7875ef22
This commit is contained in:
drh
2002-11-09 00:33:15 +00:00
parent 829e802992
commit 8766c34348
8 changed files with 67 additions and 33 deletions
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16
src/pager.c
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@@ -18,7 +18,7 @@
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.55 2002/11/06 14:08:11 drh Exp $
** @(#) $Id: pager.c,v 1.56 2002/11/09 00:33:16 drh Exp $
*/
#include "os.h" /* Must be first to enable large file support */
#include "sqliteInt.h"
@@ -815,6 +815,7 @@ static int syncAllPages(Pager *pPager){
*/
int sqlitepager_get(Pager *pPager, Pgno pgno, void **ppPage){
PgHdr *pPg;
int rc;
/* Make sure we have not hit any critical errors.
*/
@@ -829,9 +830,10 @@ int sqlitepager_get(Pager *pPager, Pgno pgno, void **ppPage){
** on the database file.
*/
if( pPager->nRef==0 ){
if( sqliteOsReadLock(&pPager->fd)!=SQLITE_OK ){
rc = sqliteOsReadLock(&pPager->fd);
if( rc!=SQLITE_OK ){
*ppPage = 0;
return SQLITE_BUSY;
return rc;
}
pPager->state = SQLITE_READLOCK;
@@ -844,10 +846,12 @@ int sqlitepager_get(Pager *pPager, Pgno pgno, void **ppPage){
*/
rc = sqliteOsWriteLock(&pPager->fd);
if( rc!=SQLITE_OK ){
rc = sqliteOsUnlock(&pPager->fd);
assert( rc==SQLITE_OK );
if( sqliteOsUnlock(&pPager->fd)!=SQLITE_OK ){
/* This should never happen! */
rc = SQLITE_INTERNAL;
}
*ppPage = 0;
return SQLITE_BUSY;
return rc;
}
pPager->state = SQLITE_WRITELOCK;