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Use an ALWAYS() on a conditional in btmutex.c that is always true. (CVS 6910)

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FossilOrigin-Name: 609022caff12c010575e704be550da6f52226d33
This commit is contained in:
drh
2009-07-20 12:33:32 +00:00
parent 8de5a17e47
commit 5dea3158fc
3 changed files with 11 additions and 9 deletions
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6
src/btmutex.c
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@@ -10,7 +10,7 @@
**
*************************************************************************
**
** $Id: btmutex.c,v 1.16 2009/07/17 11:44:07 drh Exp $
** $Id: btmutex.c,v 1.17 2009/07/20 12:33:33 drh Exp $
**
** This file contains code used to implement mutexes on Btree objects.
** This code really belongs in btree.c. But btree.c is getting too
@@ -197,7 +197,9 @@ void sqlite3BtreeEnterAll(sqlite3 *db){
if( !p->locked ){
assert( p->wantToLock==1 );
while( p->pPrev ) p = p->pPrev;
while( p->locked && p->pNext ) p = p->pNext;
/* Reason for ALWAYS: There must be at least on unlocked Btree in
** the chain. Otherwise the !p->locked test above would have failed */
while( p->locked && ALWAYS(p->pNext) ) p = p->pNext;
for(pLater = p->pNext; pLater; pLater=pLater->pNext){
if( pLater->locked ){
unlockBtreeMutex(pLater);