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Changes to src/status.c.

    99     99   int sqlite3_db_status(
   100    100     sqlite3 *db,          /* The database connection whose status is desired */
   101    101     int op,               /* Status verb */
   102    102     int *pCurrent,        /* Write current value here */
   103    103     int *pHighwater,      /* Write high-water mark here */
   104    104     int resetFlag         /* Reset high-water mark if true */
   105    105   ){
          106  +  int rc = SQLITE_OK;   /* Return code */
          107  +  sqlite3_mutex_enter(db->mutex);
   106    108     switch( op ){
   107    109       case SQLITE_DBSTATUS_LOOKASIDE_USED: {
   108    110         *pCurrent = db->lookaside.nOut;
   109    111         *pHighwater = db->lookaside.mxOut;
   110    112         if( resetFlag ){
   111    113           db->lookaside.mxOut = db->lookaside.nOut;
   112    114         }
................................................................................
   117    119       ** Return an approximation for the amount of memory currently used
   118    120       ** by all pagers associated with the given database connection.  The
   119    121       ** highwater mark is meaningless and is returned as zero.
   120    122       */
   121    123       case SQLITE_DBSTATUS_CACHE_USED: {
   122    124         int totalUsed = 0;
   123    125         int i;
          126  +      sqlite3BtreeEnterAll(db);
   124    127         for(i=0; i<db->nDb; i++){
   125    128           Btree *pBt = db->aDb[i].pBt;
   126    129           if( pBt ){
   127    130             Pager *pPager = sqlite3BtreePager(pBt);
   128    131             totalUsed += sqlite3PagerMemUsed(pPager);
   129    132           }
   130    133         }
          134  +      sqlite3BtreeLeaveAll(db);
   131    135         *pCurrent = totalUsed;
   132    136         *pHighwater = 0;
   133    137         break;
   134    138       }
   135    139       default: {
   136         -      return SQLITE_ERROR;
          140  +      rc = SQLITE_ERROR;
   137    141       }
   138    142     }
   139         -  return SQLITE_OK;
          143  +  sqlite3_mutex_leave(db->mutex);
          144  +  return rc;
   140    145   }