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Optimization to the sqlite3PcacheFetch() logic.

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FossilOrigin-Name: d9a0481ce0fd9824b1566f182d68ec46ef091b1b
This commit is contained in:
drh
2015-06-30 03:57:59 +00:00
parent 50642b1deb
commit d8c0ba3b02
4 changed files with 16 additions and 10 deletions
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6
src/pager.c
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@@ -5312,6 +5312,11 @@ int sqlite3PagerAcquire(
if( pBase==0 ){
rc = sqlite3PcacheFetchStress(pPager->pPCache, pgno, &pBase);
if( rc!=SQLITE_OK ) goto pager_acquire_err;
if( pBase==0 ){
pPg = *ppPage = 0;
rc = SQLITE_NOMEM;
goto pager_acquire_err;
}
}
pPg = *ppPage = sqlite3PcacheFetchFinish(pPager->pPCache, pgno, pBase);
if( pPg==0 ) rc = SQLITE_NOMEM;
@@ -5418,6 +5423,7 @@ DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno){
assert( pPager->pPCache!=0 );
pPage = sqlite3PcacheFetch(pPager->pPCache, pgno, 0);
assert( pPage==0 || pPager->hasBeenUsed );
if( pPage==0 ) return 0;
return sqlite3PcacheFetchFinish(pPager->pPCache, pgno, pPage);
}