diff options
Diffstat (limited to 'chromium/third_party/sqlite/src/src/status.c')
| -rw-r--r-- | chromium/third_party/sqlite/src/src/status.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/chromium/third_party/sqlite/src/src/status.c b/chromium/third_party/sqlite/src/src/status.c index 74548b73b6f..f859dd4dd48 100644 --- a/chromium/third_party/sqlite/src/src/status.c +++ b/chromium/third_party/sqlite/src/src/status.c @@ -122,7 +122,6 @@ void sqlite3StatusHighwater(int op, int X){ : sqlite3MallocMutex()) ); assert( op==SQLITE_STATUS_MALLOC_SIZE || op==SQLITE_STATUS_PAGECACHE_SIZE - || op==SQLITE_STATUS_SCRATCH_SIZE || op==SQLITE_STATUS_PARSER_STACK ); if( newValue>wsdStat.mxValue[op] ){ wsdStat.mxValue[op] = newValue; @@ -172,6 +171,28 @@ int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetFlag){ } /* +** Return the number of LookasideSlot elements on the linked list +*/ +static u32 countLookasideSlots(LookasideSlot *p){ + u32 cnt = 0; + while( p ){ + p = p->pNext; + cnt++; + } + return cnt; +} + +/* +** Count the number of slots of lookaside memory that are outstanding +*/ +int sqlite3LookasideUsed(sqlite3 *db, int *pHighwater){ + u32 nInit = countLookasideSlots(db->lookaside.pInit); + u32 nFree = countLookasideSlots(db->lookaside.pFree); + if( pHighwater ) *pHighwater = db->lookaside.nSlot - nInit; + return db->lookaside.nSlot - (nInit+nFree); +} + +/* ** Query status information for a single database connection */ int sqlite3_db_status( @@ -190,10 +211,15 @@ int sqlite3_db_status( sqlite3_mutex_enter(db->mutex); switch( op ){ case SQLITE_DBSTATUS_LOOKASIDE_USED: { - *pCurrent = db->lookaside.nOut; - *pHighwater = db->lookaside.mxOut; + *pCurrent = sqlite3LookasideUsed(db, pHighwater); if( resetFlag ){ - db->lookaside.mxOut = db->lookaside.nOut; + LookasideSlot *p = db->lookaside.pFree; + if( p ){ + while( p->pNext ) p = p->pNext; + p->pNext = db->lookaside.pInit; + db->lookaside.pInit = db->lookaside.pFree; + db->lookaside.pFree = 0; + } } break; } |