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Add tests to simulate power-failure on devices that support IOCAP_SEQUENTIAL or IOCAP_SAFE_APPEND. (CVS 4284)

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FossilOrigin-Name: bdf5cb8d25d93d48220ce46acad2ccf967a87843
This commit is contained in:
danielk1977
2007-08-24 08:15:53 +00:00
parent d5499d648f
commit f55b899824
7 changed files with 206 additions and 57 deletions
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21
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 1.372 2007/08/24 03:51:34 drh Exp $
** @(#) $Id: pager.c,v 1.373 2007/08/24 08:15:54 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
@@ -4192,7 +4192,6 @@ int sqlite3PagerCommitPhaseOne(Pager *pPager, const char *zMaster, Pgno nTrunc){
*/
if( pPager->state!=PAGER_SYNCED && !MEMDB && pPager->dirtyCache ){
PgHdr *pPg;
assert( pPager->journalOpen );
#ifdef SQLITE_ENABLE_ATOMIC_WRITE
/* The atomic-write optimization can be used if all of the
@@ -4206,9 +4205,13 @@ int sqlite3PagerCommitPhaseOne(Pager *pPager, const char *zMaster, Pgno nTrunc){
** If the optimization can be used, then the journal file will never
** be created for this transaction.
*/
if( !zMaster && pPager->journalOff==jrnlBufferSize(pPager) && nTrunc==0
&& (0==pPager->pDirty || 0==pPager->pDirty->pDirty)
){
int useAtomicWrite = (
!zMaster &&
pPager->journalOff==jrnlBufferSize(pPager) &&
nTrunc==0 &&
(0==pPager->pDirty || 0==pPager->pDirty->pDirty)
);
if( useAtomicWrite ){
/* Update the nRec field in the journal file. */
int offset = pPager->journalHdr + sizeof(aJournalMagic);
assert(pPager->nRec==1);
@@ -4221,7 +4224,12 @@ int sqlite3PagerCommitPhaseOne(Pager *pPager, const char *zMaster, Pgno nTrunc){
** this is safe.
*/
rc = pager_incr_changecounter(pPager, 1);
}else
}else{
rc = sqlite3JournalCreate(pPager->jfd);
if( rc!=SQLITE_OK ) goto sync_exit;
}
if( !useAtomicWrite )
#endif
/* If a master journal file name has already been written to the
@@ -4231,6 +4239,7 @@ int sqlite3PagerCommitPhaseOne(Pager *pPager, const char *zMaster, Pgno nTrunc){
** transaction the m-j name will have already been written.
*/
if( !pPager->setMaster ){
assert( pPager->journalOpen );
rc = pager_incr_changecounter(pPager, 0);
if( rc!=SQLITE_OK ) goto sync_exit;
#ifndef SQLITE_OMIT_AUTOVACUUM