internal int get(DB_TXN txn, uint delta, ref Int64 retp, uint flags)
 {
     int ret;
     ret = libdb_csharpPINVOKE.DB_SEQUENCE_get(swigCPtr, DB_TXN.getCPtr(txn), delta, ref retp, flags);
     DatabaseException.ThrowException(ret);
     return ret;
 }

 internal int associate(DB_TXN txn, DB sec, BDB_AssociateDelegate callback, uint flags)
 {
     int ret;
     ret = libdb_csharpPINVOKE.DB_associate(swigCPtr, DB_TXN.getCPtr(txn), DB.getCPtr(sec), callback, flags);
     DatabaseException.ThrowException(ret);
     return ret;
 }

	internal QueueStatStruct stat_qam(DB_TXN txn, uint flags) {
		int err = 0;
		IntPtr ptr = stat(txn, flags, ref err);
		DatabaseException.ThrowException(err);
		QueueStatStruct ret = (QueueStatStruct)Marshal.PtrToStructure(ptr, typeof(QueueStatStruct));
		libdb_csharp.__os_ufree(null, ptr);
		return ret;
	}

 internal int truncate(DB_TXN txn, ref uint countp, uint flags)
 {
     int ret;
     ret = libdb_csharpPINVOKE.DB_truncate(swigCPtr, DB_TXN.getCPtr(txn), ref countp, flags);
     DatabaseException.ThrowException(ret);
     return ret;
 }

 internal int put(DB_TXN txn, DatabaseEntry key, DatabaseEntry data, uint flags)
 {
     try {
     int ret;
     ret = libdb_csharpPINVOKE.DB_put(swigCPtr, DB_TXN.getCPtr(txn), DBT.getCPtr(DatabaseEntry.getDBT(key)), DBT.getCPtr(DatabaseEntry.getDBT(data)), flags);
     DatabaseException.ThrowException(ret);
     return ret;
     } finally {
       GC.KeepAlive(key);
       GC.KeepAlive(data);
     }
 }

 internal int open(DB_TXN txn, string file, string database, DBTYPE type, uint flags, int mode)
 {
     int ret;
     ret = libdb_csharpPINVOKE.DB_open(swigCPtr, DB_TXN.getCPtr(txn), file, database, (int)type, flags, mode);
     if (ret != 0)
     close(0);
     DatabaseException.ThrowException(ret);
     return ret;
 }

 internal int key_range(DB_TXN txn, DatabaseEntry key, DB_KEY_RANGE range, uint flags)
 {
     try {
     int ret;
     ret = libdb_csharpPINVOKE.DB_key_range(swigCPtr, DB_TXN.getCPtr(txn), DBT.getCPtr(DatabaseEntry.getDBT(key)), DB_KEY_RANGE.getCPtr(range), flags);
     DatabaseException.ThrowException(ret);
     return ret;
     } finally {
       GC.KeepAlive(key);
     }
 }

 internal Transaction(DB_TXN txn)
 {
     dbtxn = txn;
 }

 internal int compact(DB_TXN txn, DatabaseEntry start, DatabaseEntry stop, DB_COMPACT cdata, uint flags, DatabaseEntry end)
 {
     try {
     int ret;
     ret = libdb_csharpPINVOKE.DB_compact(swigCPtr, DB_TXN.getCPtr(txn), DBT.getCPtr(DatabaseEntry.getDBT(start)), DBT.getCPtr(DatabaseEntry.getDBT(stop)), DB_COMPACT.getCPtr(cdata), flags, DBT.getCPtr(DatabaseEntry.getDBT(end)));
     DatabaseException.ThrowException(ret);
     return ret;
     } finally {
       GC.KeepAlive(start);
       GC.KeepAlive(stop);
       GC.KeepAlive(end);
     }
 }

 private DB_TXN txn_begin(DB_TXN parent, uint flags, ref int err)
 {
     IntPtr cPtr = libdb_csharpPINVOKE.DB_ENV_txn_begin(swigCPtr, DB_TXN.getCPtr(parent), flags, ref err);
     DB_TXN ret = (cPtr == IntPtr.Zero) ? null : new DB_TXN(cPtr, false);
     return ret;
 }

 internal int dbrename(DB_TXN txn, string file, string database, string newname, uint flags)
 {
     int ret;
     ret = libdb_csharpPINVOKE.DB_ENV_dbrename(swigCPtr, DB_TXN.getCPtr(txn), file, database, newname, flags);
     DatabaseException.ThrowException(ret);
     return ret;
 }

 internal Transaction(DB_TXN txn)
 {
     dbtxn = txn;
     dbtoken = null;
 }

 internal int remove(DB_TXN txn, uint flags)
 {
     int ret;
     ret = libdb_csharpPINVOKE.DB_SEQUENCE_remove(swigCPtr, DB_TXN.getCPtr(txn), flags);
     /*
      * remove is a handle destructor, regardless of whether the remove
      * succeeds.  Reflect that in the wrapper class.
      */
     swigCPtr = new HandleRef(null, IntPtr.Zero);
     DatabaseException.ThrowException(ret);
     return ret;
 }

 internal int open(DB_TXN txn, DatabaseEntry key, uint flags)
 {
     try {
     int ret;
     ret = libdb_csharpPINVOKE.DB_SEQUENCE_open(swigCPtr, DB_TXN.getCPtr(txn), DBT.getCPtr(DatabaseEntry.getDBT(key)), flags);
     if (ret != 0)
     close(0);
     DatabaseException.ThrowException(ret);
     return ret;
     } finally {
       GC.KeepAlive(key);
     }
 }

 private DBC cursor(DB_TXN txn, uint flags, ref int err)
 {
     IntPtr cPtr = libdb_csharpPINVOKE.DB_cursor(swigCPtr, DB_TXN.getCPtr(txn), flags, ref err);
     DBC ret = (cPtr == IntPtr.Zero) ? null : new DBC(cPtr, false);
     return ret;
 }

 private IntPtr stat(DB_TXN txnid, uint flags, ref int err)
 {
     return libdb_csharpPINVOKE.DB_stat(swigCPtr, DB_TXN.getCPtr(txnid), flags, ref err);
 }

 internal int log_printf(DB_TXN txn, string str)
 {
     int ret;
     ret = libdb_csharpPINVOKE.DB_ENV_log_printf(swigCPtr, DB_TXN.getCPtr(txn), str);
     DatabaseException.ThrowException(ret);
     return ret;
 }

 internal static HandleRef getCPtr(DB_TXN obj)
 {
     return (obj == null) ? new HandleRef(null, IntPtr.Zero) : obj.swigCPtr;
 }